Vulnerability Description
OpenClaw versions prior to 2026.2.13 contain a denial of service vulnerability in webhook handlers that buffer request bodies without strict byte or time limits. Remote unauthenticated attackers can send oversized JSON payloads or slow uploads to webhook endpoints causing memory pressure and availability degradation.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openclaw | Openclaw | < 2026.2.13 |
Related Weaknesses (CWE)
References
- https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15fPatch
- https://github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cghVendor Advisory
- https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-weThird Party Advisory
FAQ
What is CVE-2026-28478?
CVE-2026-28478 is a vulnerability with a CVSS score of 7.5 (HIGH). OpenClaw versions prior to 2026.2.13 contain a denial of service vulnerability in webhook handlers that buffer request bodies without strict byte or time limits. Remote unauthenticated attackers can s...
How severe is CVE-2026-28478?
CVE-2026-28478 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-28478?
Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.