Vulnerability Description
n8n versions before 2.34.1 contain a credential validation bypass in the MCP create_workflow_from_code tool when authentication type is set to an expression. Attackers with a valid MCP Bearer API key and knowledge of a target credential ID can persist unauthorized cross-project credential references on workflows in different projects.
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-vfrj-582q-mvcp
- https://www.vulncheck.com/advisories/n8n-before-cross-project-credential-access-
FAQ
What is CVE-2026-77073?
CVE-2026-77073 is a documented vulnerability. n8n versions before 2.34.1 contain a credential validation bypass in the MCP create_workflow_from_code tool when authentication type is set to an expression. Attackers with a valid MCP Bearer API key ...
How severe is CVE-2026-77073?
CVSS scoring is not yet available for CVE-2026-77073. Check NVD for updates.
Is there a patch for CVE-2026-77073?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.