Vulnerability Description
OpenClaw before 2026.3.25 contains a pre-authentication rate-limit bypass vulnerability in webhook token validation that allows attackers to brute-force weak webhook secrets. The vulnerability exists because invalid webhook tokens are rejected without throttling repeated authentication attempts, enabling attackers to guess weak tokens through rapid successive requests.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openclaw | Openclaw | < 2026.3.25 |
Related Weaknesses (CWE)
References
- https://github.com/openclaw/openclaw/commit/0b4d07337467f4d40a0cc1ced83d45ceaec0Patch
- https://github.com/openclaw/openclaw/security/advisories/GHSA-mf5g-6r6f-ghhmVendor Advisory
- https://www.vulncheck.com/advisories/openclaw-pre-authentication-rate-limit-bypaThird Party Advisory
FAQ
What is CVE-2026-35646?
CVE-2026-35646 is a vulnerability with a CVSS score of 4.8 (MEDIUM). OpenClaw before 2026.3.25 contains a pre-authentication rate-limit bypass vulnerability in webhook token validation that allows attackers to brute-force weak webhook secrets. The vulnerability exists ...
How severe is CVE-2026-35646?
CVE-2026-35646 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-35646?
Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.