CVE-2026-100550 OpenClaw before 2026.8.1 Authentication Bypass via Access Group
An authentication bypass in OpenClaw allows unauthorized Teams members to trigger agents when groupPolicy is set to allowlist.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-100550?
CVE-2026-100550 is a medium-severity authentication bypass vulnerability in OpenClaw, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenClaw (npm package 'openclaw') before 2026.8.1 contains an access-control bypass in the Microsoft Teams integration. When groupPolicy is set to allowlist, a missing or unsupported configured access group produces a denied group-resolution result that is not rejected by the final message-admission check, so a Teams member who is not on the allowlist can still trigger the configured agent despite the administrator's group boundary. The impact depends on the conversations, tools, and data available to that agent. The issue is fixed in version 2026.8.1.
Weakness: CWE-863
Which versions are affected by CVE-2026-100550?
How do I fix CVE-2026-100550?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-100550 being exploited?
There is no known exploitation of CVE-2026-100550 in the wild and no public exploit code.
Sources
Also known as GHSA-5m2m-2jqh-2wpg, GHSA-8938-r7c6-54vq, MINI-4v3p-w56w-cr99.