fix(git): revoke access for banned relay members - #4608
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Check the durable community ban on every Git HTTP request after authentication and membership validation. Deny requests when restriction state cannot be loaded. Co-authored-by: Jordan Mecom <jm@squareup.com> Signed-off-by: Jordan Mecom <jm@squareup.com>
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August 3, 2026 21:00
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This change rechecks the durable community ban in the shared Git HTTP authentication path for advertise, fetch, and push requests. A banned member is denied even if repository-channel membership still exists, and restriction lookup errors fail closed.
The additional database lookup happens on every Git HTTP request so access revocation does not depend on stale session state.
Testing
git diff --check origin/main...codex/security-ban-revokes-gitorigin/mainat5c98932Originating Buzz thread:
buzz://message?channel=3928fe05-df61-4b5d-b9c7-d623b9b10ea1&id=3c6c02312f763fbe0d2bfc33a6c1a362f91d0354f3d18b039cf7a0558c1439d1