CVE-2026-77073
Last modified
CVE-2026-77073 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| N8n | N8n | < 2.33.4 |
| N8n | N8n | 2.34.0 |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-vfrj-582q-mvcpMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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