Description (CNA)
n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the MCP workflow-validation tool, whose interpreter evaluates caller-supplied code in the main process, reads inherited properties, and permits assignment onto shared prototypes. An authenticated member holding only a workflow:read grant can replace a built-in method with one returning a truthy value so server-side permission checks accept unheld scopes, enabling takeover of owner accounts not protected by MFA.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| n8n-io / n8n | affected 0 before 2.41.4; affected 2.42.0 before 2.42.1 |
CWE
CWE-1321
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-5jr4-xmvf-frmj
- https://www.vulncheck.com/advisories/n8n-before-2.41.4-and-2.42.1-prototype-pollution-via-mcp-workflow-validation-interpreter
ADP enrichment
No English description supplied.
No references supplied.