Description
n8n before 1.123.85, 2.43.5, and 2.44.1 contains a regular expression denial of service vulnerability that allows authenticated members to block the event loop via crafted glob patterns. Attackers who can create and run workflows can submit a wildcard-heavy File(s) Selector pattern causing exponential backtracking, making the UI, API, webhooks, and health checks unresponsive until restart.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | < 1.123.85, 2.44.0 – < 2.44.1, 2.0.0 – < 2.43.5 | 1.123.85 |
Advisories 1
- WID-SEC-2026-3898 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 28, 2026
References
- GitHub Security Advisory (GHSA-m7gv-mpg5-7c9v) vendor-advisory
- VulnCheck Advisory: n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Node third-party-advisory