{"id":"GHSA-q5wm-mgqx-fv2f","summary":"n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content","details":"## Impact\n\nInstance AI credential setup accepted a credential test/verification URL without checking it matched the workflow node's origin. Exfiltration required the user to actively inject an attacker-controlled URL into the setup flow. The patch derives the credential destination from the node's own URL and confines authenticated requests, redirects and probes to that origin.\n\n## Patches\n\nThe issue has been fixed in n8n versions 2.38.2 and 2.37.7. 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- Disable the Instance AI module by removing `instance-ai` from the `N8N_ENABLED_MODULES` environment variable if it is not required.\n- Restrict n8n instance access to fully trusted users only.\n- Rotate any third-party API credentials that were set up using the Instance AI credential-setup flow on affected versions.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","aliases":["CVE-2026-86074"],"modified":"2026-09-10T21:30:04.789468256Z","published":"2026-09-10T21:18:48Z","database_specific":{"cwe_ids":["CWE-918"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-09-10T21:18:48Z","nvd_published_at":"2026-09-08T18:21:14Z"},"references":[{"type":"WEB","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-q5wm-mgqx-fv2f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86074"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"},{"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":"2.38.0"},{"fixed":"2.38.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-q5wm-mgqx-fv2f/GHSA-q5wm-mgqx-fv2f.json"}},{"package":{"name":"n8n","ecosystem":"npm","purl":"pkg:npm/n8n"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.37.7"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-q5wm-mgqx-fv2f/GHSA-q5wm-mgqx-fv2f.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N"}]}