Description
n8n versions before 2.36.2 contain an expression sandbox bypass vulnerability where free identifiers in spread, computed-key, switch-case, or class-extension positions resolve against process globals. Authenticated users with workflow-edit permission can mutate host objects through expression evaluation, with changes persisting process-wide until restart.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | 2.36.0 – < 2.36.2, < 2.35.4 | 2.36.2 |
Advisories 1
- WID-SEC-2026-2936 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 3, 2026
References
- GitHub Security Advisory (GHSA-fg85-4wv2-p98j) vendor-advisory
- VulnCheck Advisory: n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement third-party-advisory