diff --git a/.github/actions/prepare-dependency-audit/action.yml b/.github/actions/prepare-dependency-audit/action.yml
new file mode 100644
index 00000000000..764409b4a0e
--- /dev/null
+++ b/.github/actions/prepare-dependency-audit/action.yml
@@ -0,0 +1,28 @@
+name: Prepare release dependency audit data
+description: Extract only manifests, lockfiles, and patches without candidate executable configuration
+inputs:
+  ref:
+    required: true
+    description: Exact release ref to audit
+runs:
+  using: composite
+  steps:
+    - shell: bash
+      env:
+        RELEASE_REF: ${{ inputs.ref }}
+        GH_TOKEN: ${{ github.token }}
+      run: |
+        set -euo pipefail
+        git -c credential.helper= -c 'credential.helper=!gh auth git-credential' fetch --no-tags --depth=1 origin "$RELEASE_REF"
+        mapfile -t files < <(git ls-tree -r FETCH_HEAD -- \
+          pnpm-lock.yaml pnpm-workspace.yaml mobile/pnpm-lock.yaml mobile/pnpm-workspace.yaml \
+          native config/patches mobile/patches | \
+          awk '$1 ~ /^100(644|755)$/ {sub(/^[^\t]*\t/, ""); print}' | \
+          rg '(^|/)(pnpm-lock.yaml|pnpm-workspace.yaml)$|^native/[^/]+/Cargo\.(toml|lock)$|^(config|mobile)/patches/.*\.patch$')
+        test "${#files[@]}" -gt 0
+        mkdir candidate
+        git archive --worktree-attributes FETCH_HEAD -- "${files[@]}" | tar -x -C candidate
+        for file in pnpm-lock.yaml pnpm-workspace.yaml mobile/pnpm-lock.yaml mobile/pnpm-workspace.yaml; do
+          test -f "candidate/$file"
+          test ! -L "candidate/$file"
+        done
diff --git a/.github/workflows/ci-closed-pr-caches.yml b/.github/workflows/ci-closed-pr-caches.yml
index f215a6d3226..b85e1fe4e7d 100644
--- a/.github/workflows/ci-closed-pr-caches.yml
+++ b/.github/workflows/ci-closed-pr-caches.yml
@@ -22,6 +22,7 @@ jobs:
             const superseded = context.payload.action === 'synchronize'
             const targets = [
               ['pr-checks', 'pr.yml'],
+              ['dependency-security', 'dependency-security.yml'],
               ['node-server', 'node-server-tests.yml'],
               ['ssh-windows-hosts', 'ssh-windows-hosts.yml'],
               ['ssh-hostile-hosts', 'ssh-hostile-hosts.yml'],
diff --git a/.github/workflows/dependency-security.yml b/.github/workflows/dependency-security.yml
new file mode 100644
index 00000000000..a7efa4ef748
--- /dev/null
+++ b/.github/workflows/dependency-security.yml
@@ -0,0 +1,112 @@
+name: Dependency security
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review, converted_to_draft]
+    paths:
+      - '**/package.json'
+      - '**/pnpm-lock.yaml'
+      - '**/pnpm-workspace.yaml'
+      - '**/.npmrc'
+      - 'native/**/Cargo.toml'
+      - 'native/**/Cargo.lock'
+      - 'config/dependency-security-exceptions.json'
+      - 'config/cargo-deny.toml'
+      - 'config/scripts/*dependency-security*'
+      - 'config/scripts/pnpm-cli-invocation.mjs'
+      - 'config/pnpmfile.cjs'
+      - '**/patches/**'
+      - '.github/workflows/dependency-security.yml'
+      - '.github/workflows/release-cut.yml'
+      - '.github/actions/install-node-dependencies/**'
+      - '.github/actions/prepare-dependency-audit/**'
+      - 'src/packages/process-host/**'
+  workflow_call:
+    inputs:
+      ref:
+        description: Exact release tag to audit using the workflow commit's tooling
+        required: true
+        type: string
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: dependency-security-${{ inputs.ref && github.run_id || github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  ORCA_BACKGROUND_LAUNCH: '1'
+
+jobs:
+  javascript:
+    if: github.event_name != 'pull_request' || github.event.pull_request.draft != true
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          ref: ${{ github.workflow_sha }}
+          persist-credentials: false
+      - uses: ./.github/actions/install-node-dependencies
+      - uses: ./.github/actions/prepare-dependency-audit
+        if: inputs.ref != ''
+        with:
+          ref: ${{ inputs.ref }}
+      - name: Audit JavaScript lockfiles
+        shell: bash
+        env:
+          RELEASE_REF: ${{ inputs.ref }}
+        run: |
+          if [ -n "$RELEASE_REF" ]; then
+            pnpm check:dependencies candidate . mobile
+          else
+            pnpm check:dependencies
+          fi
+      - uses: actions/upload-artifact@v7
+        if: always()
+        with:
+          name: dependency-security-javascript
+          path: tmp/dependency-security/*.json
+          if-no-files-found: error
+
+  rust:
+    if: github.event_name != 'pull_request' || github.event.pull_request.draft != true
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          ref: ${{ github.workflow_sha }}
+          persist-credentials: false
+      - uses: actions/cache@v5
+        id: scanner
+        with:
+          path: ~/.cargo/bin/cargo-deny
+          key: cargo-deny-0.20.2-${{ runner.os }}-${{ runner.arch }}
+      - if: steps.scanner.outputs.cache-hit != 'true'
+        run: cargo install cargo-deny --locked --version 0.20.2
+      - uses: ./.github/actions/prepare-dependency-audit
+        if: inputs.ref != ''
+        with:
+          ref: ${{ inputs.ref }}
+      - name: Audit native Rust lockfiles
+        shell: bash
+        working-directory: ${{ inputs.ref != '' && 'candidate' || '.' }}
+        run: |
+          set -euo pipefail
+          report_dir="$GITHUB_WORKSPACE/tmp/dependency-security"
+          mkdir -p "$report_dir"
+          status=0
+          for manifest in native/*/Cargo.toml; do
+            name="$(basename "$(dirname "$manifest")")"
+            cargo deny --manifest-path "$manifest" --locked --config "$GITHUB_WORKSPACE/config/cargo-deny.toml" check advisories 2>&1 | tee "$report_dir/$name.log" || status=1
+          done
+          exit "$status"
+      - uses: actions/upload-artifact@v7
+        if: always()
+        with:
+          name: dependency-security-rust
+          path: tmp/dependency-security/*.log
+          if-no-files-found: error
diff --git a/.github/workflows/release-cut.yml b/.github/workflows/release-cut.yml
index ff462cc0e70..3a4d09c52df 100644
--- a/.github/workflows/release-cut.yml
+++ b/.github/workflows/release-cut.yml
@@ -852,6 +852,13 @@ jobs:
           TAG: ${{ needs.cut.outputs.tag }}
         run: node config/scripts/create-draft-release.mjs "$TAG"
 
+  dependency-security:
+    needs: cut
+    if: needs.cut.outputs.should_release == 'true' && !contains(needs.cut.outputs.tag, '-')
+    uses: ./.github/workflows/dependency-security.yml
+    with:
+      ref: refs/tags/${{ needs.cut.outputs.tag }}
+
   terminal-rendering-golden:
     needs: cut
     if: needs.cut.outputs.should_release == 'true'
@@ -2436,6 +2443,7 @@ jobs:
   publish-release:
     needs:
       - cut
+      - dependency-security
       - build
       - build-mac
       - verify-mac-build
@@ -2446,6 +2454,7 @@ jobs:
     if: >-
       !cancelled() &&
       needs.cut.result == 'success' &&
+      (needs.dependency-security.result == 'success' || contains(needs.cut.outputs.tag, '-')) &&
       needs.build.result == 'success' &&
       needs.build-mac.result == 'success' &&
       needs.verify-mac-build.result == 'success' &&
diff --git a/config/cargo-deny.toml b/config/cargo-deny.toml
new file mode 100644
index 00000000000..b02d93c9cae
--- /dev/null
+++ b/config/cargo-deny.toml
@@ -0,0 +1,5 @@
+[graph]
+all-features = true
+
+[advisories]
+ignore = []
diff --git a/config/dependency-security-exceptions.json b/config/dependency-security-exceptions.json
new file mode 100644
index 00000000000..3ce690c757c
--- /dev/null
+++ b/config/dependency-security-exceptions.json
@@ -0,0 +1,54 @@
+[
+  {
+    "workspace": "mobile",
+    "package": "braces",
+    "version": "3.0.3",
+    "advisory": "GHSA-vfj7-8cjw-p6xm",
+    "owner": "Orca maintainers",
+    "reason": "Parser and AST walkers reject excessive nesting via the patch merged in #31681, covered by dependency-security-patches.test.mjs. Remove when a fixed upstream release is available.",
+    "expires": "2026-11-20",
+    "patch": {
+      "path": "patches/braces@3.0.3.patch",
+      "sha256": "c07bb14cec04bc891e1fe529720444cc9729a25117f9aaf24253cfe3132a34fd"
+    }
+  },
+  {
+    "workspace": "docs/site",
+    "package": "braces",
+    "version": "3.0.3",
+    "advisory": "GHSA-vfj7-8cjw-p6xm",
+    "owner": "Orca maintainers",
+    "reason": "Parser and AST walkers reject excessive nesting via the patch merged in #31681, covered by dependency-security-patches.test.mjs. Remove when a fixed upstream release is available.",
+    "expires": "2026-11-20",
+    "patch": {
+      "path": "../../config/patches/braces@3.0.3.patch",
+      "sha256": "c07bb14cec04bc891e1fe529720444cc9729a25117f9aaf24253cfe3132a34fd"
+    }
+  },
+  {
+    "workspace": "config/audit-tools",
+    "package": "braces",
+    "version": "3.0.3",
+    "advisory": "GHSA-vfj7-8cjw-p6xm",
+    "owner": "Orca maintainers",
+    "reason": "Parser and AST walkers reject excessive nesting via the patch merged in #31681, covered by dependency-security-patches.test.mjs. Remove when a fixed upstream release is available.",
+    "expires": "2026-11-20",
+    "patch": {
+      "path": "../patches/braces@3.0.3.patch",
+      "sha256": "c07bb14cec04bc891e1fe529720444cc9729a25117f9aaf24253cfe3132a34fd"
+    }
+  },
+  {
+    "workspace": "mobile",
+    "package": "node-forge",
+    "version": "1.4.0",
+    "advisory": "GHSA-86w9-cpqp-85rv",
+    "owner": "Orca maintainers",
+    "reason": "RSA DigestAlgorithm rejects extra nested elements via the patch merged in #31681, covered by mobile/scripts/dependency-security-patches.test.ts. Remove when a fixed upstream release is available.",
+    "expires": "2026-11-20",
+    "patch": {
+      "path": "patches/node-forge@1.4.0.patch",
+      "sha256": "2798686e4488058ad81c3b8e32eb763c0feff21f4c717ce4d13b6ef2432cd5b8"
+    }
+  }
+]
diff --git a/config/dependency-security.md b/config/dependency-security.md
new file mode 100644
index 00000000000..204d04d6aad
--- /dev/null
+++ b/config/dependency-security.md
@@ -0,0 +1,42 @@
+# Dependency security checks
+
+`pnpm check:dependencies` audits the desktop, mobile, cloud, docs, and isolated
+audit-tool lockfiles, including development and optional dependencies. It does not
+install those workspaces or execute their pnpm hooks. High/critical advisories and
+scanner failures fail the check; lower severities remain visible in JSON reports
+under `tmp/dependency-security/`.
+
+The Linux workflow runs on dependency-change PRs, manually, and when cutting a
+stable desktop release. There is no daily schedule. The release check scans the
+exact release tag in parallel with builds and must pass before the release is
+published; RC releases skip it. Stable releases audit the desktop and embedded
+mobile-web lockfiles plus native Rust. Cloud, docs, and isolated audit tooling
+remain covered by dependency PR checks and do not block desktop releases.
+Scanner tooling and exception policy come from the workflow commit, while
+lockfiles, patch registrations, and patch bytes come from the release tag. Only candidate Rust manifests, lockfiles, and patches are extracted; candidate
+package manifests, pnpm/Cargo configuration, and toolchain overrides are excluded. The candidate is
+not installed and its pnpm hooks do not run. Branch protection is unchanged.
+
+The Rust job runs pinned cargo-deny 0.20.2 directly against every native manifest
+with `--locked`, all features, and no target restriction. The scanner binary is
+cached; advisory data is fetched on every run. Reports upload even on failure.
+The first CI run took 44 seconds for JavaScript and 2m04s for Rust, including a
+cold scanner installation; the audit steps themselves took 2 and 1 seconds.
+
+The only JavaScript exceptions cover previously reviewed local patches. Each
+names an exact workspace, package, version, advisory, owner, expiry, patch path,
+and SHA-256. An exception is considered only for an actual high/critical finding.
+The patch bytes, workspace registration, and locked patch hash/snapshots must
+match before the exception applies. Expired exceptions stop exempting findings;
+stale exceptions for removed/fixed packages do not fail clean scans. Remove an
+exception and its patch when an upstream fixed version replaces them.
+
+This initial check covers JavaScript and native Rust advisories. It does not
+establish reachability or scan licenses, container layers, downloaded binaries,
+CocoaPods, Gradle, or Ruby dependencies. Registry/advisory outages fail the check
+and block stable release publication until a successful rerun. After installing
+cargo-deny, the Rust command can also be run locally:
+
+```sh
+cargo deny --manifest-path native/windows-agent-hook/Cargo.toml --locked --config config/cargo-deny.toml check advisories
+```
diff --git a/config/scripts/check-dependency-security.mjs b/config/scripts/check-dependency-security.mjs
new file mode 100644
index 00000000000..57716d60a57
--- /dev/null
+++ b/config/scripts/check-dependency-security.mjs
@@ -0,0 +1,87 @@
+import { runProcessSync } from '@orca/process-host'
+import { mkdirSync, readFileSync, writeFileSync } from 'node:fs'
+import { join, resolve } from 'node:path'
+import { pathToFileURL } from 'node:url'
+import {
+  AUDIT_WORKSPACES,
+  evaluateSecurityAudit,
+  securityExceptions
+} from './dependency-security-audit.mjs'
+import { resolvePnpmCliInvocation } from './pnpm-cli-invocation.mjs'
+
+const ROOT = resolve(import.meta.dirname, '../..')
+
+export function readSecurityAudit(result) {
+  if (
+    result.signal ||
+    result.timedOut ||
+    result.outputTruncated ||
+    (result.code !== 0 && result.code !== 1)
+  ) {
+    throw new Error(`Dependency audit failed (${result.code}): ${result.stderr || result.stdout}`)
+  }
+  const report = JSON.parse(result.stdout)
+  if (result.code === 1 && Object.keys(report.advisories ?? {}).length === 0) {
+    throw new Error('Audit failed without a vulnerability report')
+  }
+  return report
+}
+
+export function checkDependencySecurity(root = ROOT, workspaces = AUDIT_WORKSPACES) {
+  const exceptions = securityExceptions.parse(
+    JSON.parse(readFileSync(join(ROOT, 'config/dependency-security-exceptions.json'), 'utf8'))
+  )
+  const reportDir = join(ROOT, 'tmp/dependency-security')
+  mkdirSync(reportDir, { recursive: true })
+  const { command, prefixArgs } = resolvePnpmCliInvocation()
+  const today = new Date().toISOString().slice(0, 10)
+  let passed = true
+  for (const workspace of workspaces) {
+    const report = { workspace, checkedAt: new Date().toISOString() }
+    try {
+      const result = runProcessSync({
+        program: command,
+        args: [
+          ...prefixArgs,
+          'audit',
+          '--json',
+          '--ignore-pnpmfile',
+          '--registry=https://registry.npmjs.org'
+        ],
+        cwd: join(root, workspace),
+        timeoutMs: 120_000,
+        maxOutputBytes: 32 * 1024 * 1024
+      })
+      report.audit = readSecurityAudit(result)
+      report.findings = evaluateSecurityAudit(report.audit, workspace, exceptions, { root, today })
+      for (const item of report.findings) {
+        console.log(
+          `${workspace}: ${item.exception ? 'PATCHED' : item.blocking ? 'BLOCKING' : 'FINDING'} ${item.package}@${item.version} ${item.severity} ${item.advisory} ${item.url}`
+        )
+      }
+      if (report.findings.some((item) => item.blocking)) {
+        passed = false
+      }
+      console.log(`${workspace}: ${report.findings.length} finding(s)`)
+    } catch (error) {
+      report.error = error.message
+      console.error(`${workspace}: ${error.message}`)
+      passed = false
+    }
+    const name = workspace === '.' ? 'desktop' : workspace.replaceAll('/', '-')
+    writeFileSync(join(reportDir, `${name}.json`), `${JSON.stringify(report, null, 2)}\n`)
+  }
+  console.log(`Dependency reports: ${reportDir}`)
+  return passed ? 0 : 1
+}
+
+if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
+  const workspaces = process.argv.slice(3)
+  if (workspaces.some((workspace) => !AUDIT_WORKSPACES.includes(workspace))) {
+    throw new Error('Unknown dependency audit workspace')
+  }
+  process.exitCode = checkDependencySecurity(
+    resolve(process.argv[2] ?? ROOT),
+    workspaces.length ? workspaces : AUDIT_WORKSPACES
+  )
+}
diff --git a/config/scripts/ci-closed-pr-cancellation.test.mjs b/config/scripts/ci-closed-pr-cancellation.test.mjs
index d6881ec348f..64546709e46 100644
--- a/config/scripts/ci-closed-pr-cancellation.test.mjs
+++ b/config/scripts/ci-closed-pr-cancellation.test.mjs
@@ -75,6 +75,7 @@ it('looks up exact PR groups without branch or head-SHA inference', async () =>
   await result
   expect(request.mock.calls.map(([, args]) => args.concurrency_group_name)).toEqual([
     'pr-checks-123',
+    'dependency-security-123',
     'node-server-123',
     'ssh-windows-hosts-123',
     'ssh-hostile-hosts-123',
diff --git a/config/scripts/dependency-security-audit.mjs b/config/scripts/dependency-security-audit.mjs
new file mode 100644
index 00000000000..aa09c75251e
--- /dev/null
+++ b/config/scripts/dependency-security-audit.mjs
@@ -0,0 +1,107 @@
+import { createHash } from 'node:crypto'
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { parse, parseAllDocuments } from 'yaml'
+import { z } from 'zod'
+
+export const AUDIT_WORKSPACES = ['.', 'mobile', 'cloud', 'docs/site', 'config/audit-tools']
+const text = z.string().trim().min(1)
+const severities = ['info', 'low', 'moderate', 'high', 'critical']
+export const securityExceptions = z.array(
+  z.strictObject({
+    workspace: z.enum(AUDIT_WORKSPACES),
+    package: text,
+    version: text,
+    advisory: z.string().regex(/^GHSA-[-a-z0-9]+$/),
+    owner: text,
+    reason: text,
+    expires: z.iso.date(),
+    patch: z.strictObject({ path: text, sha256: z.string().regex(/^[a-f0-9]{64}$/) })
+  })
+)
+const auditSchema = z.object({
+  advisories: z.record(
+    text,
+    z.object({
+      module_name: text,
+      github_advisory_id: text,
+      severity: z.enum(severities),
+      url: z.url(),
+      findings: z.array(z.object({ version: text, paths: z.array(text).min(1) })).min(1)
+    })
+  ),
+  metadata: z.object({
+    vulnerabilities: z.object(
+      Object.fromEntries(severities.map((level) => [level, z.int().min(0)]))
+    )
+  })
+})
+
+function verifyPatch(root, exception) {
+  const cwd = join(root, exception.workspace)
+  const specifier = `${exception.package}@${exception.version}`
+  const policy = parse(readFileSync(join(cwd, 'pnpm-workspace.yaml'), 'utf8'))
+  const documents = parseAllDocuments(readFileSync(join(cwd, 'pnpm-lock.yaml'), 'utf8'))
+  for (const document of documents) {
+    if (document.errors.length) {
+      throw document.errors[0]
+    }
+  }
+  const lock = documents
+    .map((document) => document.toJS())
+    .find((value) => value?.patchedDependencies?.[specifier])
+  const snapshots = Object.keys(lock?.snapshots ?? {}).filter(
+    (key) => key === specifier || key.startsWith(`${specifier}(`)
+  )
+  if (
+    policy.patchedDependencies?.[specifier] !== exception.patch.path ||
+    lock?.patchedDependencies?.[specifier] !== exception.patch.sha256 ||
+    snapshots.length === 0 ||
+    snapshots.some((key) => !key.includes(`(patch_hash=${exception.patch.sha256})`)) ||
+    createHash('sha256')
+      .update(readFileSync(join(cwd, exception.patch.path)))
+      .digest('hex') !== exception.patch.sha256
+  ) {
+    throw new Error(`Reviewed patch is not locked: ${exception.workspace} ${specifier}`)
+  }
+}
+
+export function evaluateSecurityAudit(
+  value,
+  workspace,
+  exceptions,
+  { root, today = new Date().toISOString().slice(0, 10) } = {}
+) {
+  const audit = auditSchema.parse(value)
+  const count = Object.values(audit.metadata.vulnerabilities).reduce((sum, n) => sum + n, 0)
+  if (count !== Object.keys(audit.advisories).length) {
+    throw new Error('Incomplete vulnerability report')
+  }
+  const findings = []
+  for (const advisory of Object.values(audit.advisories)) {
+    for (const finding of advisory.findings) {
+      const item = {
+        package: advisory.module_name,
+        version: finding.version,
+        advisory: advisory.github_advisory_id,
+        severity: advisory.severity,
+        url: advisory.url,
+        blocking: ['high', 'critical'].includes(advisory.severity)
+      }
+      const exception = exceptions.find(
+        (entry) =>
+          entry.workspace === workspace &&
+          entry.package === item.package &&
+          entry.version === item.version &&
+          entry.advisory === item.advisory
+      )
+      if (item.blocking && exception && exception.expires > today) {
+        verifyPatch(root, exception)
+        item.exception = exception
+        item.blocking = false
+      }
+      findings.push(item)
+    }
+  }
+  return findings
+}
diff --git a/config/scripts/dependency-security-audit.test.mjs b/config/scripts/dependency-security-audit.test.mjs
new file mode 100644
index 00000000000..4be59ccea3d
--- /dev/null
+++ b/config/scripts/dependency-security-audit.test.mjs
@@ -0,0 +1,149 @@
+import { createHash } from 'node:crypto'
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { afterEach, expect, it } from 'vitest'
+import { stringify } from 'yaml'
+import { evaluateSecurityAudit } from './dependency-security-audit.mjs'
+import { readSecurityAudit } from './check-dependency-security.mjs'
+
+const roots = []
+afterEach(() => roots.splice(0).forEach((root) => rmSync(root, { recursive: true, force: true })))
+const today = '2026-10-22'
+const patch = 'reviewed security fix\n'
+const sha256 = createHash('sha256').update(patch).digest('hex')
+const exception = {
+  workspace: '.',
+  package: 'example',
+  version: '1.2.3',
+  advisory: 'GHSA-1234-5678-9abc',
+  owner: 'Maintainer',
+  reason: 'Patched while awaiting upstream',
+  expires: '2026-11-20',
+  patch: { path: 'example.patch', sha256 }
+}
+function audit(severity = 'high', versions = ['1.2.3']) {
+  return {
+    advisories: versions.length
+      ? {
+          123: {
+            module_name: 'example',
+            github_advisory_id: exception.advisory,
+            severity,
+            url: 'https://github.com/advisories/GHSA-1234-5678-9abc',
+            findings: versions.map((version) => ({ version, paths: ['.>build-tool>example'] }))
+          }
+        }
+      : {},
+    metadata: {
+      vulnerabilities: {
+        info: 0,
+        low: 0,
+        moderate: 0,
+        high: 0,
+        critical: 0,
+        [severity]: versions.length ? 1 : 0
+      }
+    }
+  }
+}
+function patchedWorkspace() {
+  const root = mkdtempSync(join(tmpdir(), 'orca-dependency-security-'))
+  roots.push(root)
+  writeFileSync(join(root, 'example.patch'), patch)
+  writeFileSync(
+    join(root, 'pnpm-workspace.yaml'),
+    stringify({
+      patchedDependencies: { 'example@1.2.3': 'example.patch' }
+    })
+  )
+  const lock = {
+    patchedDependencies: { 'example@1.2.3': sha256 },
+    snapshots: { [`example@1.2.3(patch_hash=${sha256})`]: {} }
+  }
+  const writeLock = () =>
+    writeFileSync(
+      join(root, 'pnpm-lock.yaml'),
+      `---\n${stringify({ lockfileVersion: '9.0', importers: {}, snapshots: {} })}---\n${stringify(lock)}`
+    )
+  writeLock()
+  return { root, lock, writeLock }
+}
+
+it.each(['high', 'critical'])('blocks %s advisories including build-time findings', (severity) => {
+  expect(evaluateSecurityAudit(audit(severity), '.', [], { today })).toEqual([
+    expect.objectContaining({ severity, blocking: true })
+  ])
+})
+it('retains lower severities without blocking', () => {
+  expect(evaluateSecurityAudit(audit('moderate'), '.', [], { today })).toEqual([
+    expect.objectContaining({ severity: 'moderate', blocking: false })
+  ])
+})
+it('applies an exception only to the exact patched finding', () => {
+  const { root } = patchedWorkspace()
+  const findings = evaluateSecurityAudit(audit('high', ['1.2.3', '2.0.0']), '.', [exception], {
+    root,
+    today
+  })
+  expect(findings.map((item) => item.blocking)).toEqual([false, true])
+  for (const change of [
+    { workspace: 'mobile' },
+    { package: 'other' },
+    { advisory: 'GHSA-abcd-5678-9abc' }
+  ]) {
+    expect(
+      evaluateSecurityAudit(audit(), '.', [{ ...exception, ...change }], { root, today })[0]
+        .blocking
+    ).toBe(true)
+  }
+})
+it('lets expired and removed patch exceptions coexist with a clean graph', () => {
+  expect(
+    evaluateSecurityAudit(audit('high', []), '.', [exception], { today: '2026-11-20' })
+  ).toEqual([])
+  expect(
+    evaluateSecurityAudit(audit(), '.', [exception], { today: '2026-11-20' })[0].blocking
+  ).toBe(true)
+})
+it.each(['bytes', 'registration', 'lock hash', 'unpatched snapshot'])(
+  'refuses a changed %s',
+  (change) => {
+    const { root, lock, writeLock } = patchedWorkspace()
+    if (change === 'bytes') {
+      writeFileSync(join(root, 'example.patch'), 'different fix')
+    }
+    if (change === 'registration') {
+      writeFileSync(join(root, 'pnpm-workspace.yaml'), '{}')
+    }
+    if (change === 'lock hash') {
+      lock.patchedDependencies['example@1.2.3'] = '0'.repeat(64)
+    }
+    if (change === 'unpatched snapshot') {
+      lock.snapshots['example@1.2.3'] = {}
+    }
+    writeLock()
+    expect(() => evaluateSecurityAudit(audit(), '.', [exception], { root, today })).toThrow(
+      'Reviewed patch'
+    )
+  }
+)
+it('rejects incomplete reports instead of treating them as clean', () => {
+  expect(() => evaluateSecurityAudit({}, '.', [], { today })).toThrow()
+  const incomplete = audit()
+  incomplete.advisories = {}
+  expect(() => evaluateSecurityAudit(incomplete, '.', [], { today })).toThrow('Incomplete')
+})
+it.each([
+  { code: 2 },
+  { signal: 'SIGTERM' },
+  { timedOut: true },
+  { outputTruncated: true },
+  { stdout: '{' },
+  { code: 1, stdout: '{"error":"registry unavailable"}' }
+])('fails closed on scanner errors: %j', (change) => {
+  expect(() => readSecurityAudit({ code: 0, stdout: JSON.stringify(audit()), ...change })).toThrow()
+})
+it('reads nonzero finding reports for policy evaluation', () => {
+  expect(readSecurityAudit({ code: 1, stdout: JSON.stringify(audit()) })).toEqual(audit())
+})
diff --git a/config/scripts/dependency-security-release.test.mjs b/config/scripts/dependency-security-release.test.mjs
new file mode 100644
index 00000000000..750376f0ea7
--- /dev/null
+++ b/config/scripts/dependency-security-release.test.mjs
@@ -0,0 +1,164 @@
+import { existsSync, mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { dirname, join } from 'node:path'
+import { runProcess } from '@orca/process-host'
+import { runInNewContext } from 'node:vm'
+import { expect, it } from 'vitest'
+import { parse } from 'yaml'
+
+const release = parse(readFileSync('.github/workflows/release-cut.yml', 'utf8'))
+const security = parse(readFileSync('.github/workflows/dependency-security.yml', 'utf8'))
+const gate = release.jobs['dependency-security']
+const publish = release.jobs['publish-release']
+
+function evaluate(expression, tag, result) {
+  const needs = Object.fromEntries(publish.needs.map((job) => [job, { result: 'success' }]))
+  needs.cut.outputs = { tag, should_release: 'true' }
+  needs['dependency-security'].result = result
+  return runInNewContext(expression.replace(/needs\.([\w-]+)/g, 'needs["$1"]'), {
+    needs,
+    cancelled: () => false,
+    contains: (value, part) => value.includes(part)
+  })
+}
+
+it('blocks stable publication until its dependency scan succeeds while leaving RCs independent', () => {
+  for (const tag of ['v1.5.0', 'v2.0.1']) {
+    expect(evaluate(gate.if, tag, 'success')).toBe(true)
+    expect(evaluate(publish.if, tag, 'success')).toBe(true)
+    for (const result of ['failure', 'cancelled', 'skipped', '', undefined]) {
+      expect(evaluate(publish.if, tag, result)).toBe(false)
+    }
+  }
+  for (const tag of ['v1.5.0-rc.1', 'v1.5.0-rc.1.perf']) {
+    expect(evaluate(gate.if, tag, 'skipped')).toBe(false)
+    expect(evaluate(publish.if, tag, 'skipped')).toBe(true)
+  }
+})
+
+it('scans the release tag with read-only workflow tooling instead of installing candidate code', () => {
+  expect(gate.with.ref).toBe('refs/tags/${{ needs.cut.outputs.tag }}')
+  expect(gate.uses).toBe('./.github/workflows/dependency-security.yml')
+  expect(security.permissions).toEqual({ contents: 'read' })
+  expect(security.on.schedule).toBeUndefined()
+  for (const job of Object.values(security.jobs)) {
+    const checkouts = job.steps.filter((step) => step.uses === 'actions/checkout@v6')
+    expect(checkouts).toHaveLength(1)
+    expect(checkouts[0].with.ref).toBe('${{ github.workflow_sha }}')
+    const preparation = job.steps.find(
+      (step) => step.uses === './.github/actions/prepare-dependency-audit'
+    )
+    expect(preparation.with.ref).toBe('${{ inputs.ref }}')
+    expect(preparation.if).toBe("inputs.ref != ''")
+    for (const step of job.steps) {
+      if (step.uses?.startsWith('./')) {
+        expect(step['working-directory']).toBeUndefined()
+        expect(step.with?.['working-directory']).toBeUndefined()
+      }
+    }
+  }
+})
+
+it('extracts release data while excluding executable package and Cargo configuration', async () => {
+  const root = mkdtempSync(join(tmpdir(), 'release audit data '))
+  const source = join(root, 'source')
+  const tooling = join(root, 'tooling')
+  mkdirSync(source)
+  mkdirSync(tooling)
+  const data = [
+    'pnpm-lock.yaml',
+    'pnpm-workspace.yaml',
+    'mobile/pnpm-lock.yaml',
+    'mobile/pnpm-workspace.yaml',
+    'native/example/Cargo.toml',
+    'native/example/Cargo.lock',
+    'config/patches/example.patch',
+    'mobile/patches/example.patch'
+  ]
+  const configuration = [
+    'package.json',
+    'mobile/package.json',
+    '.gitattributes',
+    '.npmrc',
+    '.pnpmfile.cjs',
+    'config/pnpmfile.cjs',
+    'mobile/.npmrc',
+    'mobile/.pnpmfile.cjs',
+    '.cargo/config.toml',
+    'native/.cargo/config.toml',
+    'native/example/.cargo/config.toml',
+    'native/example/rust-toolchain.toml',
+    'native/example/build.rs'
+  ]
+  async function run(program, args, cwd, env = process.env) {
+    const result = await runProcess({ program, args, cwd, env })
+    expect(result.code, result.stderr).toBe(0)
+  }
+  try {
+    for (const file of [...data, ...configuration]) {
+      mkdirSync(dirname(join(source, file)), { recursive: true })
+      writeFileSync(
+        join(source, file),
+        file === '.gitattributes'
+          ? '*.yaml export-ignore\n*.patch export-subst\n'
+          : `${file} contents`
+      )
+    }
+    await run('git', ['init', '--quiet'], source)
+    await run('git', ['add', '.'], source)
+    await run(
+      'git',
+      [
+        '-c',
+        'user.name=Test',
+        '-c',
+        'user.email=test@example.com',
+        'commit',
+        '--quiet',
+        '-m',
+        'fixture'
+      ],
+      source
+    )
+    await run('git', ['init', '--quiet'], tooling)
+    await run('git', ['remote', 'add', 'origin', source], tooling)
+    const action = parse(
+      readFileSync('.github/actions/prepare-dependency-audit/action.yml', 'utf8')
+    )
+    await run('bash', ['-c', action.runs.steps[0].run], tooling, {
+      ...process.env,
+      RELEASE_REF: 'HEAD'
+    })
+    for (const file of data) {
+      expect(readFileSync(join(tooling, 'candidate', file), 'utf8')).toBe(`${file} contents`)
+    }
+    for (const file of configuration) {
+      expect(existsSync(join(tooling, 'candidate', file)), file).toBe(false)
+    }
+    rmSync(join(tooling, 'candidate'), { recursive: true })
+    await run('git', ['rm', '--quiet', 'pnpm-workspace.yaml'], source)
+    await run(
+      'git',
+      [
+        '-c',
+        'user.name=Test',
+        '-c',
+        'user.email=test@example.com',
+        'commit',
+        '--quiet',
+        '-m',
+        'missing workspace'
+      ],
+      source
+    )
+    const missing = await runProcess({
+      program: 'bash',
+      args: ['-c', action.runs.steps[0].run],
+      cwd: tooling,
+      env: { ...process.env, RELEASE_REF: 'HEAD' }
+    })
+    expect(missing.code).not.toBe(0)
+  } finally {
+    rmSync(root, { recursive: true, force: true })
+  }
+})
diff --git a/config/scripts/package-electron-runtime-contract.test.mjs b/config/scripts/package-electron-runtime-contract.test.mjs
index c02dfa984b3..9c6139bf881 100644
--- a/config/scripts/package-electron-runtime-contract.test.mjs
+++ b/config/scripts/package-electron-runtime-contract.test.mjs
@@ -136,7 +136,8 @@ describe('Electron runtime package contract', () => {
     const evaluate = (source, needs, cancelled) =>
       runInNewContext(source.replace(/needs\.([a-z][a-z0-9-]*)/g, 'needs["$1"]'), {
         needs,
-        cancelled: () => cancelled
+        cancelled: () => cancelled,
+        contains: (value, part) => value.includes(part)
       })
     const results = ['success', 'failure', 'skipped', 'cancelled']
     for (const matrix of results) {
@@ -144,7 +145,8 @@ describe('Electron runtime package contract', () => {
         for (const verification of results) {
           for (const cancelled of [false, true]) {
             const needs = {
-              cut: { result: 'success', outputs: { should_release: 'true' } },
+              cut: { result: 'success', outputs: { should_release: 'true', tag: 'v1.5.0' } },
+              'dependency-security': { result: 'success' },
               build: { result: matrix },
               'build-mac': { result: dispatch },
               'verify-mac-build': { result: verification },
@@ -167,14 +169,16 @@ describe('Electron runtime package contract', () => {
     }
     for (const prerequisite of [
       'cut',
+      'dependency-security',
       'skill-sharing-linux-floor-release-gate',
       'skill-sharing-release-gate',
       'terminal-rendering-golden'
     ]) {
       const needs = Object.fromEntries([
-        ['cut', { result: 'success', outputs: { should_release: 'true' } }],
+        ['cut', { result: 'success', outputs: { should_release: 'true', tag: 'v1.5.0' } }],
         ...[
           'build',
+          'dependency-security',
           'build-mac',
           'verify-mac-build',
           'skill-sharing-linux-floor-release-gate',
diff --git a/config/scripts/release-cut-token-permissions.test.mjs b/config/scripts/release-cut-token-permissions.test.mjs
index 4df557d73ea..25b890a03d7 100644
--- a/config/scripts/release-cut-token-permissions.test.mjs
+++ b/config/scripts/release-cut-token-permissions.test.mjs
@@ -51,6 +51,12 @@ const EXPECTED_MATRIX = {
   [`${RELEASE_WORKFLOW}#verify-mac-build`]: { actions: 'read', contents: 'read' },
   [`${RELEASE_WORKFLOW}#create-release`]: { contents: 'write' },
   [`${RELEASE_WORKFLOW}#cut`]: { contents: 'write' },
+  [`${RELEASE_WORKFLOW}#dependency-security`]: { contents: 'read' },
+  [`${RELEASE_WORKFLOW}#dependency-security -> .github/workflows/dependency-security.yml#javascript`]:
+    { contents: 'read' },
+  [`${RELEASE_WORKFLOW}#dependency-security -> .github/workflows/dependency-security.yml#rust`]: {
+    contents: 'read'
+  },
   [`${RELEASE_WORKFLOW}#docs-production-dispatch`]: { actions: 'write' },
   [`${RELEASE_WORKFLOW}#homebrew-bump`]: { contents: 'read' },
   [`${RELEASE_WORKFLOW}#homebrew-bump -> .github/workflows/homebrew-bump.yml#bump-cask`]: {
diff --git a/package.json b/package.json
index e5bf821656f..4843904071a 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   },
   "main": "./out/main/index.js",
   "scripts": {
+    "check:dependencies": "pnpm run build:packages && node config/scripts/check-dependency-security.mjs",
     "install:release": "pnpm install --frozen-lockfile --cpu=current,x64,arm64",
     "audit:perf": "oxlint --config config/oxlint-performance-audit.json --format json src",
     "test:perf:contracts": "vitest run --config config/vitest.performance.config.ts",