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Any authenticated user with access to the execution data for an affected workflow can read the header names and values, which typically contain API keys or other secrets.\n\nBecause execution data can be persisted to the database and exported, leaked values may remain accessible beyond the lifetime of a single execution.\n\nThis issue only affects instances where workflows use LLM sub-nodes with custom headers defined in their credentials.\n\n## Patches\nThe issue has been fixed in n8n versions 1.123.64, 2.29.8, and 2.30.1. 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- Restrict access to execution data to fully trusted users only.\n- Avoid configuring custom headers in LLM node credentials; use alternative authentication mechanisms where possible.\n- Rotate any API keys or secrets that may have been stored as custom header values in affected credentials.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","state":0,"publishedAt":"2026-07-22T22:54:01+00:00","modifiedAt":"2026-07-22T23:11:44.096072+00:00","affected":[{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.123.64"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.30.0"},{"kind":"fixed","version":"2.30.1"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.0.0-rc.0"},{"kind":"fixed","version":"2.29.8"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/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-89gh-3pgc-v5h2","https://nvd.nist.gov/vuln/detail/CVE-2026-65589","https://github.com/n8n-io/n8n","https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.64","https://github.com/n8n-io/n8n/releases/tag/n8n@2.29.8","https://github.com/n8n-io/n8n/releases/tag/n8n@2.30.1","https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-llm-node-execution-data"],"sourceUrl":"https://github.com/advisories/GHSA-89gh-3pgc-v5h2","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-89gh-3pgc-v5h2","identifiers":["GHSA-89gh-3pgc-v5h2","CVE-2026-65589"]},"retained":false,"historicalAffected":[]},{"revision":"cd310f8988a745f8be3e6102aa6227ef","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-fmvg-vhqq-r2mj","aliases":[],"title":"Duplicate Advisory: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00A0GHSA-89gh-3pgc-v5h2. This link is maintained to preserve external references.\n\n## Original Description\n\nn8n versions before 1.123.64 fail to properly mask custom HTTP header credentials in LLM sub-node execution data, writing plaintext API keys and secrets to workflow execution records. 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