The Origin header is trivially forgeable by any container on the Docker
network. Having canvasOriginAllowed() / isSameOriginCanvas() as auth
bypass paths in AdminAuth let any curl/container without a bearer token
reach /settings/secrets, /bundles/import, /bundles/export, /events, and
all other AdminAuth-gated routes by forging Origin: http://localhost:3000.
Fix: remove both Origin bypass branches from AdminAuth. Bearer token is
now the only accepted credential. Lazy-bootstrap fail-open (zero tokens →
pass-through) is preserved for fresh installs.
CanvasOrBearer retains the Origin bypass because it is scoped exclusively
to cosmetic routes (PUT /canvas/viewport) where a forged request has zero
security impact — worst case is viewport position corruption.
Added 3 regression tests:
- TestAdminAuth_623_ForgedOrigin_Returns401
- TestAdminAuth_623_ForgedCORSOrigin_Returns401
- TestAdminAuth_623_ValidBearer_WithOrigin_Passes
Closes#623, Closes#626
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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