Medium severity4.3NVD Advisory· Published Aug 20, 2026· Updated Sep 1, 2026
CVE-2026-77073
CVE-2026-77073
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.
Affected products
1Patches
Vulnerability mechanics
References
2- github.com/n8n-io/n8n/security/advisories/GHSA-vfrj-582q-mvcpnvdMitigationVendor Advisory
- www.vulncheck.com/advisories/n8n-before-cross-project-credential-access-via-mcpnvdThird Party Advisory
News mentions
1- N8n: 18 Vulnerabilities Including Code Execution and SSRF Disclosed in BatchVypr Intelligence · Aug 20, 2026