Vulnerabilities CVE-2026-77073

CVE-2026-77073

Medium

Open

TLP:CLEAR

n8n before 2.34.1 Cross-Project Credential Access via MCP

NVD CVE.org

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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.

Details

CVSS Score: 5.3
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Confidence: 90%
Published: Aug 20, 2026
Last Modified: Aug 21, 2026

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