{"id":"GHSA-h9fm-xcv2-qfw3","title":"Duplicate Advisory: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook","summary":"Duplicate Advisory: Unauthenticated Endpoint Allows Cancellation of Any User's Active Test Webhook","severity":"medium","cwe":["CWE-306"],"vendor":"n8n","product":"n8n","ecosystem":"npm","affected":["n8n < 2.27.4"],"published":"2026-07-22","updated":"2026-07-22","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-h9fm-xcv2-qfw3","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-33q9-f52j-gc75"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65014"},{"url":"https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook"},{"url":"https://github.com/advisories/GHSA-h9fm-xcv2-qfw3"}],"tags":["ghsa","npm"],"ingestedAt":"2026-07-22T23:07:33.655Z","slug":"GHSA-h9fm-xcv2-qfw3","body":"## Overview\n\n## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-33q9-f52j-gc75.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.\n\n## Affected packages\n\n- `n8n < 2.27.4`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}