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BREW-openclaw-cli-CVE-2026-34506 — OpenClaw's MS Teams sender allowlist bypass when route allowlist is configured and sender allowlist is empty

Affected: Homebrew: openclaw-cli

OpenClaw's Microsoft Teams plugin widened group sender authorization when a team/channel route allowlist was configured but `groupAllowFrom` was empty. Before the fix, a matching route allowlist entry could cause the message handler to synthesize wildcard sender authorization for that route, allowing any sender in the matched team/channel to bypass the intended `groupPolicy: "allowlist"` sender check.

This does not affect default unauthenticated access, but it does weaken a documented Teams group authorization boundary and can allow unauthorized group senders to trigger replies in allowlisted Teams routes.

## Affected Packages / Versions

- Package: `openclaw` (npm) - Latest published vulnerable version: `2026.3.7` - Affected range: `<= 2026.3.7` - Fixed in released version: `2026.3.8`

## Fix Commit(s)

- `88aee9161e0e6d32e810a25711e32a808a1777b2`

## Release Verification

- Verified fixed in GitHub release `v2026.3.8` published on March 9, 2026. - Verified `npm view openclaw version` resolves to `2026.3.8`. - Verified the release contains the regression test covering the Teams route-allowlist sender-bypass case and that the test passes against the `v2026.3.8` tree.

Thanks @zpbrent for reporting.

cnvd-2026-17897

EUVD-2026-329493

fkie_cve-2026-34506

OpenClaw before 2026.3.8 contains a sender allowlist bypass vulnerability in its Microsoft Teams plugin that allows unauthorized senders to bypass intended authorization checks. When a team/channel route allowlist is configured with an empty groupAllowFrom parameter, the message handler synthesizes wildcard sender authorization, permitting any sender in the matched team/channel to trigger replies in allowlisted Teams routes.

GHSA-g7cr-9h7q-4qxq — OpenClaw's MS Teams sender allowlist bypass when route allowlist is configured and sender allowlist is empty

Affected: npm: openclaw