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Diego ImbertandClaude Fable 5
339c259fce
save_draft encrypts secret variable values with the workspace key, but the ciphertext was round-tripped to the client and the deploy endpoints decrypted whatever $encrypted: ciphertext the client submitted (variables.rs create/update). Any workspace member who can write a variable path could take an arbitrary workspace-key ciphertext (another user's secret draft via GET /drafts/get with only path-read, or a deployed secret's stored value) and submit it as their own secret variable's value — the server decrypted it and, since they own the path, they read the plaintext back. That bypasses the audited decrypt_secret permission. Fix: the ciphertext never leaves the server. get_variable swaps a draft secret's $encrypted: value for an opaque $draft_secret sentinel (both the draft overlay and the draft-only inner stand-in). On deploy the client sends the sentinel back and the server rehydrates the plaintext from the caller's OWN draft row — the only ciphertext it ever decrypts is one it encrypted for this exact (workspace, path, email). A raw $encrypted: submitted by a client is now rejected outright. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>