Auth bypass in Openclaw
CVE-2026-100534
OpenClaw versions before 2026.8.1 contain an authorization bypass vulnerability in webhook TaskFlow cancellation that allows attackers to cancel unrelated sessions. An attacker with a webhook route secret can supply an arbitrary child session key to cancel ACP or subagent work outside the route's configured authority.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (18.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-g24w-m94m-59qc) (vendor-advisory)
- VulnCheck Advisory: OpenClaw before 2026.8.1 Session Cancellation Authorization Bypass (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100534?
- CVE-2026-100534 is a low-severity vulnerability in Openclaw, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 3.1/10. Published 2026-09-26.
- How severe is CVE-2026-100534?
- Low severity. CVSS v3 base score is 3.1 out of 10.