PT-2026-29239 · Microsoft+1 · Teams Plugin+1

Peng Zhou · CVE-2026-34509 · Published 2026-03-31 · Updated 2026-03-31

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions OpenClaw versions prior to 2026.3.8

Description The software contains a sender allowlist bypass in its Microsoft Teams plugin. This allows unauthorized senders to bypass intended authorization checks. Specifically, when a team/channel route allowlist is configured with an empty groupAllowFrom parameter, the message handler creates wildcard sender authorization, permitting any sender in the matched team/channel to trigger replies in allowlisted Teams routes.

Recommendations Update to version 2026.3.8 or later.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-34509

Affected Products

Teams Plugin

Openclaw

References · 6

• https://github.com/openclaw/openclaw/commit/88aee9161e0e6d32e810a25711e32a808a1777b2 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-34509 · Security Note
• https://github.com/openclaw/openclaw/security/advisories/GHSA-g7cr-9h7q-4qxq · Note
• https://twitter.com/cyberbivash/status/2038977723662586184 · Twitter Post
• https://vulncheck.com/advisories/openclaw-sender-allowlist-bypass-in-microsoft-teams-plugin-via-route-allowlist-configuration-2 · Note
• https://twitter.com/CVEnew/status/2039004477668123057 · Twitter Post