Auth bypass in Openclaw Feishu
CVE-2026-100540
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-h2qg-fxpv-82v6) (vendor-advisory)
- VulnCheck Advisory: OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100540?
- CVE-2026-100540 is a medium-severity vulnerability in Openclaw Feishu, classified under Incorrect Authorization. CVSS score: 6.8/10. Published 2026-09-26.
- How severe is CVE-2026-100540?
- Medium severity. CVSS v3 base score is 6.8 out of 10.