CVE-2026-100540 OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account
Attackers can bypass authentication in multi-account setups to read or modify Feishu resources using credentials from a disabled default account.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100540?
CVE-2026-100540 is a high-severity authentication bypass vulnerability in openclaw feishu, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenClaw Feishu before 2026.8.1 fails to validate whether a configured default account is disabled before selecting it for model tool operations. Attackers can exploit multi-account setups where a disabled default account retains credentials to read or modify Feishu resources through a revoked identity.
Weakness: CWE-863
Which versions are affected by CVE-2026-100540?
How do I fix CVE-2026-100540?
No fix has been published for CVE-2026-100540 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-100540 being exploited?
There is no known exploitation of CVE-2026-100540 in the wild and no public exploit code.
Sources
Also known as GHSA-77rw-6qrm-8q2v, GHSA-h2qg-fxpv-82v6.