Auth bypass in Openclaw
CVE-2026-41372
OpenClaw before 2026.4.2 fails to normalize trailing-dot localhost hosts in remote CDP discovery responses, allowing bypass of loopback protections. Attackers can craft hostile discovery responses returning localhost. to retarget authenticated browser control toward localhost endpoints and expose browser state.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% 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: 0.004 · change: +0.002
Affected products
- Openclaw — versions 0, 2026.4.2
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-fh32-73r9-rgh5 (vendor-advisory, Vendor Advisory)
- github.com/openclaw/openclaw/commit/9c22d636697336a6b22b0ae24798d8b8325d7828 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-loopback-protection-bypass-via-trailing-d… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-41372?
- CVE-2026-41372 is a medium-severity vulnerability in Openclaw, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.8/10. Published 2026-04-28.
- How severe is CVE-2026-41372?
- Medium severity. CVSS v3 base score is 5.8 out of 10.