Vulnerability Report

CVE-2026-34506

Title: Sender Allowlist Bypass in OpenClaw Microsoft Teams Plugin

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-34506.

CWE Category CWE-863

Published Date Mar 31, 2026

Modified Date Apr 01, 2026

Exploit Status Not Found

Score 2.3 CVSS v4.0

Exploit Probability (EPSS)

0.27%

Vulnerability Summary

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.

Impacted Vendors

openclaw 1

Reference Links

https://github.com/openclaw/openclaw/commit/88aee9161e0e6d32e810a25711e32a808a1777b2 https://github.com/openclaw/openclaw/security/advisories/GHSA-g7cr-9h7q-4qxq https://www.vulncheck.com/advisories/openclaw-sender-allowlist-bypass-in-microsoft-teams-plugin-via-route-allowlist-configuration

CVSS v4.0

Source Entity [email protected]

Severity LOW

2.3

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

4.3