What’s Vulnerable › Vulnerabilities

CVE-2026-34506: OpenClaw < 2026.3.8 - Sender Allowlist Bypass in Microsoft Teams Plugin via Route Allowlist Configuration

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-31 · updated 2026-07-24
• Weakness: CWE-863

Description

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.

Affected products

• OpenClaw: before 2026.3.8 — fixed in 2026.3.8

How to fix

Upgrade to a fixed version: OpenClaw 2026.3.8. Check the vendor advisory for mitigations.

References

• 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

Get alerted when CVE-2026-34506 or the next vulnerability affects your stack