CVE-2026-100540: OpenClaw Feishu before 2026.8.1 Authentication Bypass via Disabled Account

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-26 · updated 2026-10-08
Weakness: CWE-863

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.

Affected products

openclaw feishu: before 2026.8.1 — fixed in 2026.8.1

How to fix

Upgrade to a fixed version: openclaw feishu 2026.8.1. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-h2qg-fxpv-82v6
https://www.vulncheck.com/advisories/openclaw-feishu-before-2026.8.1-authentication-bypass-via-disabled-account

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