CVE-2026-77079

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.

CVSS 4.0

7.4CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-25)

CWE

CWE-639

Published

2026-08-20

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• n8n:n8n

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

Check your stackJSON