{"id":"CVE-2026-65014","summary":"n8n before 2.28.0 Authentication Bypass via test-webhook","details":"n8n before 2.28.0 (and before 2.27.4 on the 2.27.x branch) registers the DELETE /${restEndpoint}/test-webhook/:id endpoint before authentication middleware is applied, allowing any unauthenticated network caller who knows a workflow ID to cancel that workflow's active test webhook registration. The impact is limited to disrupting in-progress test sessions; production webhooks, persistent workflow state, and stored data are not affected.","aliases":["GHSA-33q9-f52j-gc75"],"modified":"2026-07-29T03:31:47.990685410Z","published":"2026-07-22T11:21:37.350Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-306"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65014.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65014.json"},{"type":"ADVISORY","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-33q9-f52j-gc75"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65014"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/n8n-io/n8n","events":[{"introduced":"f4871fea29cb99720dbcecbcb276839663356c11"},{"fixed":"a4d0dfce294064026be1a6a246e6da348fea1485"}],"database_specific":{"source":"CPE_RANGE","cpe":["cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*","cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*"],"extracted_events":[{"introduced":"2.27.0"},{"fixed":"2.27.4"}]}}],"versions":["n8n@2.27.3","n8n@2.27.2","n8n@2.27.1","n8n@2.27.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65014.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}