{"id":"EUVD-2026-42610","revision":null,"records":[{"revision":"071d46de5d1c47ddbffb0bb08110408e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-59208","aliases":[],"title":"n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution","description":"n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.","state":0,"publishedAt":"2026-07-09T15:27:28.126+00:00","modifiedAt":"2026-07-14T00:20:06.366+00:00","affected":[{"ecosystem":"Vendor product","name":"n8n","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"n8n-io\",\n                    \"product\": \"n8n\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.28.0, < 2.28.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"< 2.27.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":7.6,"severity":"HIGH"}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w","https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4","https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-59208","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-59208","identifiers":["CVE-2026-59208"]},"retained":false,"historicalAffected":[]},{"revision":"2d02f4cb5ee04261bc1cfc3694e5bdd6","observedAt":"2026-11-07T13:25:00.085+00:00","statement":{"source":"euvd","id":"EUVD-2026-42610","aliases":["CVE-2026-59208","GHSA-mq3m-f8x3-579w"],"title":"n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT…","description":"n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":7.6,"severity":null}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w","https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4","https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-42610","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 9, 2026, 3:27:28 PM","dateUpdated":"Jul 14, 2026, 12:20:06 AM"},"relatedAdvisories":[{"id":"NCSC-2026-0228","title":"Kwetsbaarheden verholpen in n8n workflow automation platform","vulnerabilityIds":["CVE-2026-59253","CVE-2026-59257","CVE-2026-59206","CVE-2026-59207","CVE-2026-59208","CVE-2026-59209"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-42610","identifiers":["EUVD-2026-42610","CVE-2026-59208","GHSA-mq3m-f8x3-579w"]},"retained":false,"historicalAffected":[]},{"revision":"faeaae09273e423abdb69ceca9583d02","observedAt":"2026-10-27T15:15:33.457+00:00","statement":{"source":"nvd","id":"CVE-2026-59208","aliases":[],"title":"n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT…","description":"n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.","state":0,"publishedAt":"2026-07-09T16:16:46.61+00:00","modifiedAt":"2026-10-25T17:10:00.197+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.6,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","score":6.8,"severity":"MEDIUM"}],"references":["https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4","https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1","https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59208","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-287","CWE-346"],"productCriteria":["cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*","cpe:2.3:a:n8n:n8n:2.28.0:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-07-09T16:16:46.610","lastModified":"2026-10-25T17:10:00.197"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-59208","identifiers":["CVE-2026-59208"]},"retained":false,"historicalAffected":[]},{"revision":"9a7330e0c7bc4fcf9bb24f00870d2ef9","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-mq3m-f8x3-579w","aliases":["CVE-2026-59208"],"title":"n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution","description":"## Impact\nWhen an n8n instance is configured with more than one trusted token-exchange issuer, external identities are resolved to local accounts using only the JWT `sub` claim, ignoring the issuer (`iss`). As a result, two different issuers that emit the same subject value map to the same local account.\n\nAn attacker who can obtain a valid token from one trusted issuer with a `sub` matching a victim registered under a different issuer can authenticate as that victim and access their account.\n\nThis issue only affects instances where the token exchange feature is enabled and more than one trusted external issuer is configured.\n\n## Patches\nThe issue has been fixed in n8n version 2.28.1. Users should upgrade to this version or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- If multiple trusted issuers are not required, reduce the token exchange configuration to a single trusted issuer.\n- Disable the token exchange feature entirely if it is not in active use.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","state":0,"publishedAt":"2026-07-22T21:59:15+00:00","modifiedAt":"2026-07-22T22:16:06.8238175+00:00","affected":[{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.28.0"},{"kind":"fixed","version":"2.28.1"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.27.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w","https://nvd.nist.gov/vuln/detail/CVE-2026-59208","https://github.com/n8n-io/n8n","https://github.com/n8n-io/n8n/releases/tag/n8n@2.27.4","https://github.com/n8n-io/n8n/releases/tag/n8n@2.28.1"],"sourceUrl":"https://github.com/advisories/GHSA-mq3m-f8x3-579w","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-mq3m-f8x3-579w","identifiers":["GHSA-mq3m-f8x3-579w","CVE-2026-59208"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-07T21:52:16.7895348+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-07T21:52:16.7895348+00:00","lastSuccessAt":"2026-11-07T21:52:17.018923+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:17.0189237+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-bb5c9d5a08063ef076042e33dd72a7d0ffa4c4487efdcf3106e29ba55ec2ad57-5978693a555a2fac0feee4f8e1cdc5e013b9a91b16046d4e34ae63a3d3db8d19","complete":true,"records":420947,"lastAttemptAt":"2026-11-07T21:52:16.4606105+00:00","lastSuccessAt":"2026-11-07T21:52:16.3995215+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:16.4606105+00:00","snapshotPublishedAt":"2026-11-07T21:18:20+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-c91a0736a9624a48aebf081ca5dd86b2","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T22:04:27.1191985+00:00","lastSuccessAt":"2026-11-07T22:04:27.115+00:00","error":null,"lastVerifiedAt":"2026-11-07T22:04:27.115+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-07T21:52:16.7895348+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T21:52:16.7895348+00:00","lastSuccessAt":"2026-11-07T21:52:17.0199092+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:17.0199095+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-2b22c2d15f834007aa54c93f73b8deaf","complete":true,"records":13645,"lastAttemptAt":"2026-11-07T21:52:42.2590883+00:00","lastSuccessAt":"2026-11-07T21:52:42.255+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:42.255+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0eb4d6dde62dffacd040ad992d4fd5a65cd7d0dc5f5f4cfa8b41967fc6f9ca5f","complete":true,"records":9914,"lastAttemptAt":"2026-11-07T21:52:16.7352005+00:00","lastSuccessAt":"2026-11-06T20:10:36.6450506+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:16.7352005+00:00","snapshotPublishedAt":"2026-11-06T20:02:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-07T21:52:16.5087916+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:16.5087916+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-335633e78a15c9cde10a6025895b5617717087fb945489ae7e15d377bacf34a9","complete":true,"records":3055,"lastAttemptAt":"2026-11-07T21:52:16.7531721+00:00","lastSuccessAt":"2026-11-06T16:03:00.7615789+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:16.7531721+00:00","snapshotPublishedAt":"2026-11-06T16:02:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-40ad6183a951565ace1520a9b4d631e1d0bfb1d4bf7c5574c375032559f3ff53","complete":true,"records":231292,"lastAttemptAt":"2026-11-07T21:52:16.6283313+00:00","lastSuccessAt":"2026-11-07T10:29:00.4821259+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:52:16.6283313+00:00","snapshotPublishedAt":"2026-11-07T09:32:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}