by Kastro
Paper/Archive/CVE-2026-54307

CVE-2026-54307

n8n-io n8n — n8n: Credential Exfiltration via Permission Bypass

EPSS 0.4%CVSS 9.6
critical.is priorityof 100
35
CVSS 9.6 (NVD)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 32.6.326 × 206.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, a 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. This issue affects instances where workflow sharing is enabled and at least one workflow has been shared with a member-level user as an Editor. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2.

Affected

ProductAffectedFixed inSource
n8n< 1.123.55–CNA
n8n>= 2.0.0-rc.0, < 2.25.7–CNA
n8n>= 2.26.0, < 2.26.2–CNA

Scores by source

NVD9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
GitHub_M (CNA)8.5CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgithub.com/n8n-io/n8n/security/advisories/GHSA-pmqw-72cg-wx85