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.

• CWE-639

• https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhjMitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletionThird Party Advisory

Published

Aug 20, 2026

Last Modified

Oct 24, 2026

Status

Analyzed

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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