{"id":"CVE-2026-35665","state":"PUBLISHED","title":"OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing","description":"OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries.","publishedAt":"2026-04-10T16:03:25.047Z","updatedAt":"2026-06-23T16:16:18.466Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["OpenClaw OpenClaw"],"affected":[{"vendor":"OpenClaw","product":"OpenClaw","packageURL":"pkg:npm/openclaw","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2026.3.24","versionType":"semver"},{"version":"2026.3.24","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/openclaw/openclaw/security/advisories/GHSA-w6m8-cqvj-pg5v","https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-feishu-webhook-pre-auth-body-parsing"],"weaknesses":["CWE-405"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35665.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35665","state":"PUBLISHED","datePublished":"2026-04-10T16:03:25.047Z","dateUpdated":"2026-06-23T16:16:18.466Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-04-04T12:31:57.498Z"},"containers":{"cna":{"title":"OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing","descriptions":[{"lang":"en","value":"OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries."}],"affected":[{"vendor":"OpenClaw","product":"OpenClaw","packageURL":"pkg:npm/openclaw","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2026.3.24","versionType":"semver"},{"version":"2026.3.24","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-w6m8-cqvj-pg5v","name":"GitHub Security Advisory (GHSA-w6m8-cqvj-pg5v)","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-feishu-webhook-pre-auth-body-parsing","name":"VulnCheck Advisory: OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing","tags":["third-party-advisory"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-405","lang":"en","description":"CWE-405 Asymmetric Resource Consumption (Amplification)","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-06-23T16:16:18.466Z"},"tags":["x_open-source"],"datePublic":"2026-03-27T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*","versionEndExcluding":"2026.3.24"}]}]}],"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-10T16:57:19.263506Z","id":"CVE-2026-35665","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-10T16:58:15.053Z"}}]}}}