{"id":"CVE-2026-35640","aliases":["GHSA-3h52-cx59-c456"],"url":"https://o3.security/vulnerability/CVE-2026-35640","summary":"OpenClaw < 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing","details":"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.","published":"2026-04-09T21:27:08.792Z","modified":"2026-07-15T01:49:21.644086697Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"openclaw","fixedVersion":"2026.3.28"}],"fix":{"url":"https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53","label":"openclaw/openclaw@5e8cb22"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35640.json"},{"type":"ADVISORY","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35640"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing"},{"type":"FIX","url":"https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:21.644086697Z"}}