{"id":"GHSA-f2cp-m7mv-8jpv","summary":"n8n: Path Injection in Elasticsearch and ElasticSecurity Nodes via Unencoded Identifiers","details":"## Impact\n\nThe Elasticsearch and ElasticSecurity nodes built REST endpoints by interpolating user-provided identifiers straight into the request path. A value containing path separators or dot segments changed which endpoint the request actually reached, so an operation intended for one document could hit another index or a cluster administration endpoint instead, under the stored Elasticsearch credential. The patch encodes each identifier as a single URL path segment and rejects values that normalise away.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.76, 2.37.7, and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Disable the affected nodes by adding `n8n-nodes-base.elasticsearch` and `n8n-nodes-base.elasticSecurity` to the `NODES_EXCLUDE` environment variable if they are not required.\n- Audit existing workflows that use these nodes and ensure that index and document identifier fields do not accept externally-controlled input.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","aliases":["CVE-2026-86079"],"modified":"2026-09-10T21:15:05.057951957Z","published":"2026-09-10T21:05:43Z","database_specific":{"nvd_published_at":"2026-09-08T22:19:16Z","cwe_ids":["CWE-22"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-09-10T21:05:43Z"},"references":[{"type":"WEB","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-f2cp-m7mv-8jpv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86079"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2"}],"affected":[{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.123.76"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-f2cp-m7mv-8jpv/GHSA-f2cp-m7mv-8jpv.json"}},{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.38.0"},{"fixed":"2.38.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-f2cp-m7mv-8jpv/GHSA-f2cp-m7mv-8jpv.json"}},{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.0"},{"fixed":"2.37.7"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-f2cp-m7mv-8jpv/GHSA-f2cp-m7mv-8jpv.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N"}]}