Vulnerability Description
OpenClaw before 2026.5.26 contains a hostname validation vulnerability allowing attackers to bypass blocklist comparisons using trailing-dot notation in model or workspace-derived URLs. Attackers can exploit inconsistent hostname checks to reach destinations that operators intended to block through hostname policies.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openclaw | Openclaw | < 2026.5.26 |
Related Weaknesses (CWE)
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-gxg4-2rrr-jhc7Vendor AdvisoryMitigation
- https://www.vulncheck.com/advisories/openclaw-hostname-validation-bypass-via-traThird Party Advisory
FAQ
What is CVE-2026-53859?
CVE-2026-53859 is a vulnerability with a CVSS score of 6.5 (MEDIUM). OpenClaw before 2026.5.26 contains a hostname validation vulnerability allowing attackers to bypass blocklist comparisons using trailing-dot notation in model or workspace-derived URLs. Attackers can ...
How severe is CVE-2026-53859?
CVE-2026-53859 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53859?
Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.