{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35640","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-04-04T12:30:33.464Z","datePublished":"2026-04-09T21:27:08.792Z","dateUpdated":"2026-04-10T12:29:52.811Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-04-09T21:27:08.792Z"},"title":"OpenClaw < 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing","descriptions":[{"lang":"en","value":"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."}],"tags":["x_open-source"],"datePublic":"2026-03-26T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-696","description":"CWE-696: Incorrect Behavior Order","type":"CWE"}]}],"affected":[{"vendor":"OpenClaw","product":"OpenClaw","defaultStatus":"unaffected","packageURL":"pkg:npm/openclaw","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"2026.3.25"},{"version":"2026.3.25","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*","versionEndExcluding":"2026.3.25"}]}]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW","version":"3.1","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456","name":"GitHub Security Advisory (GHSA-3h52-cx59-c456)","tags":["third-party-advisory"]},{"url":"https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53","name":"Patch Commit","tags":["patch"]},{"name":"VulnCheck Advisory: OpenClaw < 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing"}],"credits":[{"lang":"en","value":"tdjackey","type":"reporter"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-10T12:25:51.531666Z","id":"CVE-2026-35640","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-10T12:29:52.811Z"}}]}}