CVE-2026-77079n8n before 2.34.1 Authorization Bypass via Custom Role Deletion
Updated under an hour ago ()
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It affects n8n-io n8n and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.4 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n8n-io n8n n8n_io:n8n (from the name) | from 2.34.0 before 2.34.1; 2.34.1 not affected | CNA record |
n8n n8n n8n:n8n | before 2.33.4; 2.34.0 | NVD |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhjvendor-advisory, mitigation
- https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletionthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.