Vulnerability Description
OpenClaw versions prior to 2026.2.15 contain a denial of service vulnerability in the web_fetch tool that allows attackers to crash the Gateway process through memory exhaustion by parsing oversized or deeply nested HTML responses. Remote attackers can social-engineer users into fetching malicious URLs with pathological HTML structures to exhaust server memory and cause service unavailability.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openclaw | Openclaw | < 2026.2.15 |
Related Weaknesses (CWE)
References
- https://github.com/openclaw/openclaw/commit/166cf6a3e04c7df42bea70a7ad5ce2b9df46Patch
- https://github.com/openclaw/openclaw/security/advisories/GHSA-p536-vvpp-9mc8Vendor Advisory
- https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-reThird Party Advisory
FAQ
What is CVE-2026-28394?
CVE-2026-28394 is a vulnerability with a CVSS score of 6.5 (MEDIUM). OpenClaw versions prior to 2026.2.15 contain a denial of service vulnerability in the web_fetch tool that allows attackers to crash the Gateway process through memory exhaustion by parsing oversized o...
How severe is CVE-2026-28394?
CVE-2026-28394 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-2026-28394?
Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.