windmill

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Ruben Fiszel c2deea13b7 fix(security): a WM_TOKEN job token can never be a global superadmin (GHSA-hfh4-cx4h-3fcr) (#10124 )

* fix(security): a WM_TOKEN job token can never be a global superadmin (GHSA-hfh4-cx4h-3fcr)

Privilege escalation: an app/flow/schedule/trigger execution policy's `on_behalf_of`
(which a `wm_deployers` member can set) could point at a superadmin email. The
resulting job `WM_TOKEN` then passed the email-based superadmin checks, granting
instance superadmin. `forbid_superadmin_job_token` only guarded ~15 of ~75 routes.

Fix at the token layer: a WM_TOKEN must never satisfy a superadmin gate,
regardless of whose email it runs as (sentinel OR a real superadmin).

- `ApiAuthed` gains a `job_id` field, stamped once in `AuthCache::get_opt_job_authed`
from the resolved token's job_id (correct even on cache hits).
- `require_super_admin(db, email)` -> `require_super_admin(db, &ApiAuthed)`, rejects
`authed.job_id.is_some()`. `require_super_admin_email` kept for the few internal
callers without an ApiAuthed.
- `is_super_admin_authed(db, &ApiAuthed)` for the boolean `is_super_admin_email`
authorization branches on request handlers (workspace deletion, fork drops,
dev-workspace attach/archive, object-storage SSRF exemption, custom dbname, EE GHES
+ connected repositories, ...). Migrate ~75 sites (OSS + EE).
- CUSTOM_INSTANCE_DB reads the *authenticated* job_id, not the caller-supplied
`?job_id` query param. Worker-tag check takes a precomputed job-aware `is_super_admin`
on the request path.

Execution-time on-behalf checks (scheduled/flow worker-tag, Cloud enqueue quota,
is_devops_email) are hardened in a follow-up — see
docs/followup-onbehalf-execution-privilege-hardening.md.

Regression tests: a superadmin-email WM_TOKEN is rejected on `require_super_admin`
routes, on `DELETE /workspaces/delete/{w}` (403, workspace preserved), and on the
CUSTOM_INSTANCE_DB lookup with no `?job_id` (401); real superadmin tokens still succeed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix: cap devops role at workspace admin and reject reserved on_behalf_of identities

Extends the job-token cap with three pieces:

- `require_devops_role` takes `&ApiAuthed` and rejects job tokens.
`is_devops_email` is true for superadmin emails, so every worker-management,
instance-config and service-log route was reachable by the same superadmin
`WM_TOKEN` that `require_super_admin` already rejects.
- A `job_id` claim that does not parse as a uuid rejects the token rather than
resolving to `None`, which would clear the job provenance and uncap it. Applies
to the internal JWT and the external `jwt_ext_` path.
- Defense in depth at store time: `validate_on_behalf_of` refuses the reserved
internal sentinels as an `on_behalf_of` on apps/flows/scripts/schedules/triggers,
and app execution refuses a policy carrying one — covering already-persisted and
forked-app rows that predate the cap. Deploying on behalf of a real user,
including a real superadmin, stays allowed; the cap handles that at execution.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(mcp): preserve job-token provenance when minting the proxy JWT

The MCP endpoint-tool proxy re-mints a JWT from the caller's ApiAuthed to
forward the proxied request, but passed job_id: None. A job's WM_TOKEN is
capped at workspace admin (GHSA-hfh4-cx4h-3fcr); dropping the job_id here
re-minted an uncapped token that satisfies require_super_admin /
require_devops_role on the proxied route (e.g. listWorkers exposing worker
IPs, job/workspace IDs, and sensitive tags).

Carry api_authed.job_id into create_jwt_token. Adds an in-module regression
that decodes the forwarded JWT and asserts the job_id is preserved for a job
caller and absent for a non-job caller.

Reported by Codex CI review (P1) on #10124.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix: cap the admin-or-devops gate at workspace admin for job tokens

require_admin_or_devops (the EE critical-alerts endpoints) grants when the
caller is a workspace admin OR an instance devops. is_devops_email is true
for superadmins, so a WM_TOKEN running on-behalf of a superadmin who is not a
member of the target workspace could clear the devops branch and read/ack that
workspace's critical alerts (GHSA-hfh4-cx4h-3fcr). This gate takes a bare
email, not an ApiAuthed, so the token-layer cap could not see it.

Thread the caller's job-token provenance and reject the devops branch for job
tokens, matching require_devops_role. The workspace-admin branch stays allowed
— that is the cap ceiling. Adds an enterprise-gated regression proving the
bypass is closed and a real superadmin token still clears the gate.

Found while auditing the PR for bare-email gates the choke-point cap misses.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix: cap instance-global is_admin gates at workspace admin for job tokens

Three instance-global routes gate on the caller's own `is_admin` claim, which
`ApiAuthed.is_admin` carries into a WM_TOKEN (it is a workspace-admin claim,
true for superadmins too). A job token is capped at workspace admin
(GHSA-hfh4-cx4h-3fcr), so its is_admin claim must not authorize instance
actions on a route with no workspace binding:

- `unarchive_workspace` — unarchive an arbitrary workspace by id
- `prune_concurrency_group` — delete a global concurrency group
- `list_worker_groups` — return unobfuscated `env_vars_static` (may hold secrets)

Add job-token-aware `is_instance_admin` / `require_instance_admin` helpers (the
same shape as `require_super_admin` / `require_devops_role`) and use them at
these three sites. Workspace-scoped `require_admin(authed.is_admin, ...)` gates
are intentionally left unchanged — a workspace-admin job token is within the
cap there. Regression added covering all three; verified it lets a WM_TOKEN
unarchive/leak without the fix and is blocked with it.

Reported by Codex CI review (P1) on #10124.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(mcp): drop orphaned path_field_renames from EndpointTool test helper

The merge with main adopted main's mcp path-substitution refactor (#10162),
which removed the `path_field_renames` field from `EndpointTool` and its
consumer (`substitute_path_params` no longer takes per-field path renames).
main's `runner.rs` `ep` test helper still constructed the struct with
`path_field_renames: None`, so the workspace test build (cargo test --all,
which compiles windmill-mcp's own #[cfg(test)] module under the `server`
feature) failed with E0560. A plain `cargo check` does not compile that test
module, so it only surfaced in CI's cargo_test.

Remove the orphaned field to match the struct.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* test: describe the sentinel-rejection policy the forged-identity test asserts