{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-103245","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-09-30T10:52:32.248Z","datePublished":"2026-10-01T10:41:52.707Z","dateUpdated":"2026-10-01T15:02:26.087Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-01T10:41:52.707Z"},"datePublic":"2026-09-16T00:00:00.000Z","title":"n8n before 1.123.80, 2.39.6, and 2.40.1 Missing Webhook Signature Verification","descriptions":[{"lang":"en","value":"n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 fail to verify the x-webflow-signature HMAC in the Webflow Trigger node webhook handler. Unauthenticated attackers can send forged webhook requests with attacker-controlled payloads to trigger workflows and manipulate downstream actions like record creation or API calls."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Improper Verification of Cryptographic Signature","cweId":"CWE-347","type":"CWE"}]}],"affected":[{"vendor":"n8n-io","product":"n8n","defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"1.123.80"},{"version":"2.0.0","status":"affected","versionType":"semver","lessThan":"2.39.6"},{"version":"2.40.0","status":"affected","versionType":"semver","lessThan":"2.40.1"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*","versionEndExcluding":"1.123.80"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*","versionStartIncluding":"2.0.0","versionEndExcluding":"2.39.6"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*","versionStartIncluding":"2.40.0","versionEndExcluding":"2.40.1"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-hwv9-jhc7-f7c4","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-hwv9-jhc7-f7c4)"},{"name":"VulnCheck Advisory: n8n before 1.123.80, 2.39.6, and 2.40.1 Missing Webhook Signature Verification","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-missing-webhook-signature-verification"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-01T15:02:18.003977Z","id":"CVE-2026-103245","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":"2026-10-01T15:02:26.087Z"}}]}}