Auth bypass in Openclaw
CVE-2026-42439
OpenClaw before 2026.4.10 contains a server-side request forgery policy bypass vulnerability in the browser tabs action select and close routes. Attackers can bypass configured browser SSRF policy protections by exploiting the /tabs/action endpoint to perform unauthorized tab navigation operations.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% 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: 0.004 · change: +0.002
Affected products
- Openclaw — versions 0, 2026.4.10
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-rj2p-j66c-mgqh (vendor-advisory, Vendor Advisory)
- github.com/openclaw/openclaw/commit/48c0347921b7e9438af0312968fc360ca88023f3 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-ssrf-policy-bypass-in-browser-tabs-action… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-42439?
- CVE-2026-42439 is a high-severity vulnerability in Openclaw, classified under Missing Authorization. CVSS score: 8.5/10. Published 2026-05-05.
- How severe is CVE-2026-42439?
- High severity. CVSS v3 base score is 8.5 out of 10.