CVE-2026-35640

Description

OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook signatures, allowing unauthenticated attackers to force resource-intensive parsing operations. Remote attackers can send malicious webhook requests to trigger denial of service by exhausting server resources through forced JSON parsing before signature rejection.

CVSS Vector

References

• https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53
• https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456
• https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing