fix(channels): restrict private-channel invitations - #4612
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Require an active owner or admin for third-party private-channel additions in both relay validation and the transactional database authority. Preserve idempotent self-targeting. 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 requires an active owner or administrator for third-party additions to private channels. The relay validator and transactional database authority enforce the same rule, including removed-member reactivation and role-change paths.
Idempotent self-target behavior remains available, while ordinary members can no longer extend private-channel access to another identity.
Testing
git diff --check origin/main...codex/security-private-channel-invite-authorityorigin/mainat5c98932Originating Buzz thread:
buzz://message?channel=3928fe05-df61-4b5d-b9c7-d623b9b10ea1&id=3c6c02312f763fbe0d2bfc33a6c1a362f91d0354f3d18b039cf7a0558c1439d1