Vulnerability details
CVE-2026-77079
n8n-io n8n
n8n before 2.34.1 Authorization Bypass via Custom Role Deletion
CVSS 4.0
7.4High
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.4High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| n8n-io | n8n | 2.0.0 ≤ v < 2.33.4 | CVEProject cvelistV5 (CNA) |
| n8n-io | n8n | 2.34.0 ≤ v < 2.34.1 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-08-20
- Last updated
- 2026-08-25
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.45%
Probability of exploitation in 30 days
39.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-639Authorization Bypass Through User-Controlled Key