Auth bypass in Openclaw
CVE-2026-100553
OpenClaw versions >= 2026.6.9 and < 2026.8.1 do not declare the native chatId parameter as a delivery target in the Feishu unpin feature, so unpin requests can bypass the shared same-provider cross-context target check. When tools.message.crossContext.allowWithinProvider is disabled, an admitted (authenticated) sender can remove a pin from another Feishu group that the sender and the configured account are otherwise permitted to access, bypassing the intended cross-context message mutation policy. Feishu membership and group authorization still apply, and the demonstrated impact is limited to message mutation (pin removal). The issue is fixed in 2026.8.1.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (12.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.0% 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-h9jh-75j7-7hhx) (vendor-advisory)
- VulnCheck Advisory: OpenClaw 2026.6.9 before 2026.8.1 Cross-Context Policy Bypass via Feishu unpin (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100553?
- CVE-2026-100553 is a medium-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-09-26.
- How severe is CVE-2026-100553?
- Medium severity. CVSS v3 base score is 4.3 out of 10.