{"id":"CVE-2026-77079","state":"PUBLISHED","title":"n8n before 2.34.1 Authorization Bypass via Custom Role Deletion","description":"n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project role with a reassignment target, the code validated only that the target role existed and was project-scoped, performing no project-level authorization check. A user holding only the narrow role:manageProject global scope could delete any custom project role in use on the instance and reassign its holders (including themselves) to the built-in project:admin role, gaining full administrative control of projects they had no legitimate access to.","publishedAt":"2026-08-20T11:21:11.692Z","updatedAt":"2026-08-25T14:30:49.241Z","severity":{"score":7.4,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H","source":"VulnCheck"},"assigner":"VulnCheck","products":["n8n-io n8n"],"affected":[{"vendor":"n8n-io","product":"n8n","packageURL":"pkg:npm/n8n","defaultStatus":"unaffected","versions":[{"version":"2.34.0","status":"affected","lessThan":"2.34.1","versionType":"semver"},{"version":"2.34.1","status":"unaffected","versionType":"semver"}]},{"vendor":"n8n-io","product":"n8n","packageURL":"pkg:npm/n8n","defaultStatus":"unaffected","versions":[{"version":"2.0.0","status":"affected","lessThan":"2.33.4","versionType":"semver"},{"version":"2.33.4","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhj","https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletion"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/77xxx/CVE-2026-77079.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77079","state":"PUBLISHED","datePublished":"2026-08-20T11:21:11.692Z","dateUpdated":"2026-08-25T14:30:49.241Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-20T10:55:09.093Z"},"containers":{"cna":{"title":"n8n before 2.34.1 Authorization Bypass via Custom Role Deletion","descriptions":[{"lang":"en","value":"n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project role with a reassignment target, the code validated only that the target role existed and was project-scoped, performing no project-level authorization check. A user holding only the narrow role:manageProject global scope could delete any custom project role in use on the instance and reassign its holders (including themselves) to the built-in project:admin role, gaining full administrative control of projects they had no legitimate access to."}],"affected":[{"vendor":"n8n-io","product":"n8n","packageURL":"pkg:npm/n8n","defaultStatus":"unaffected","versions":[{"version":"2.34.0","status":"affected","lessThan":"2.34.1","versionType":"semver"},{"version":"2.34.1","status":"unaffected","versionType":"semver"}]},{"vendor":"n8n-io","product":"n8n","packageURL":"pkg:npm/n8n","defaultStatus":"unaffected","versions":[{"version":"2.0.0","status":"affected","lessThan":"2.33.4","versionType":"semver"},{"version":"2.33.4","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhj","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-xhmh-8fgr-xqhj)"},{"url":"https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletion","name":"VulnCheck Advisory: n8n before 2.34.1 Authorization Bypass via Custom Role Deletion","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":7.4,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-21T11:21:20.155Z"},"datePublic":"2026-08-05T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*","versionEndExcluding":"2.34.1"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*","versionEndExcluding":"2.33.4"}]}]}],"credits":[{"lang":"en","value":"yadhukrishnam","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-25T14:29:56.466814Z","id":"CVE-2026-77079","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-25T14:30:49.241Z"}}]}}}