{"id":"GHSA-2vff-hj5x-8gq7","revision":"0a700c5485a147e392d49a263453e81e","records":[{"revision":"0a700c5485a147e392d49a263453e81e","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-2vff-hj5x-8gq7","aliases":["CVE-2026-54306"],"title":"n8n: Prototype Pollution enables confused-deputy execution via public webhooks","description":"## Impact\nA prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes.\n\nWhere a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy — targeting unintended records or issuing outbound requests using the workflow owner's configured credentials.\n\n## Patches\nThe issue has been fixed in n8n versions 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Avoid exposing public (unauthenticated) webhook workflows that pass incoming data through transform nodes into action nodes with sensitive credentials or database operations.\n- Limit workflow creation and editing permissions to fully trusted users only.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","state":0,"publishedAt":"2026-06-16T19:00:41+00:00","modifiedAt":"2026-07-20T14:00:27.0665502+00:00","affected":[{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.26.0"},{"kind":"fixed","version":"2.26.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.25.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-2vff-hj5x-8gq7","https://nvd.nist.gov/vuln/detail/CVE-2026-54306","https://github.com/n8n-io/n8n"],"sourceUrl":"https://github.com/advisories/GHSA-2vff-hj5x-8gq7","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-2vff-hj5x-8gq7","identifiers":["GHSA-2vff-hj5x-8gq7","CVE-2026-54306"]},"retained":false,"historicalAffected":[]}],"coverage":[]}