{"id":"GHSA-h9fm-xcv2-qfw3","summary":"Duplicate Advisory: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook","details":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-33q9-f52j-gc75. This link is maintained to preserve external references.\n\n## Original Description\n\nn8n 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and stored data are not affected.","modified":"2026-07-22T22:46:08.492288933Z","published":"2026-07-22T12:32:17Z","withdrawn":"2026-07-22T22:32:48Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-07-22T22:32:48Z","nvd_published_at":"2026-07-22T12:18:18Z","cwe_ids":["CWE-306"]},"references":[{"type":"WEB","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":"WEB","url":"https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook"}],"affected":[{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c 2.27.4","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-h9fm-xcv2-qfw3/GHSA-h9fm-xcv2-qfw3.json"}}],"schema_version":"1.9.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}