{"id":"CVE-2026-54307","aliases":["GHSA-pmqw-72cg-wx85"],"url":"https://o3.security/vulnerability/CVE-2026-54307","summary":"n8n: Credential Exfiltration via Permission Bypass","details":"## Impact\nA member-level user with editor access to a shared workflow could reference credentials they do not own via specific public API endpoints. Credential ownership checks were only enforced partially leading to cross-user credential access.\n\nThis issue affects instances where workflow sharing is enabled and at least one workflow has been shared with a member-level user as an Editor.\n\n## Patches\nThe issue has been fixed in n8n versions 1.123.55, 2.25.7, and 2.26.2. 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 sharing to fully trusted users only.\n- Audit shared workflows for unexpected credential references or recent modifications.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.\n\n---\nn8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backwards compatibility.\n\nCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","published":"2026-06-23T15:47:25.593Z","modified":"2026-08-12T03:51:18.426753315Z","cvss":null,"epss":{"score":0.00386,"percentile":0.31608,"asOf":"2026-09-01"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"n8n","fixedVersion":"1.123.55"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.26.2"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.25.7"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54307.json"},{"type":"ADVISORY","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-pmqw-72cg-wx85"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54307"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:18.426753315Z"}}