{"id":"GHSA-75qm-gp28-rcq9","revision":null,"records":[{"revision":"3a769e3e45f54c0fa096d34d861d5056","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-59206","aliases":[],"title":"n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration","description":"n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.","state":0,"publishedAt":"2026-07-09T15:30:28.166+00:00","modifiedAt":"2026-07-09T18:38:07.061+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\": \">= 2.0.0-rc.0, < 2.27.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"< 1.123.61\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N","score":7.1,"severity":"HIGH"}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9","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-2026-59206","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-59206","identifiers":["CVE-2026-59206"]},"retained":false,"historicalAffected":[]},{"revision":"f7f9a0ce35f7441490377e0846d8c4af","observedAt":"2026-11-07T13:24:57.723+00:00","statement":{"source":"euvd","id":"EUVD-2026-42612","aliases":["CVE-2026-59206","GHSA-75qm-gp28-rcq9"],"title":"n8n is an open source workflow automation platform. 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As a result, every account's personal data (email, role, MFA status) and all projects on the instance may be disclosed to unauthenticated callers. The pollution can also corrupt global state, making parts of the instance unresponsive until restarted.\n\n## Patches\nThe issue has been fixed in n8n versions 1.123.61, 2.27.4, and 2.28.1. 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 workflow creation and editing permissions to fully trusted users only.\n- Restrict network access to the n8n instance to trusted users only.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","state":0,"publishedAt":"2026-07-22T21:57:21+00:00","modifiedAt":"2026-07-22T22:00:27.0334629+00:00","affected":[{"ecosystem":"npm","name":"n8n","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.123.61"}]}],"versions":[],"rawVersionEvidence":null},{"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":"2.0.0-rc.0"},{"kind":"fixed","version":"2.27.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/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-75qm-gp28-rcq9","https://nvd.nist.gov/vuln/detail/CVE-2026-59206","https://github.com/n8n-io/n8n","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://github.com/advisories/GHSA-75qm-gp28-rcq9","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-75qm-gp28-rcq9","identifiers":["GHSA-75qm-gp28-rcq9","CVE-2026-59206"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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