Description
n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a NoSQL injection vulnerability in the MongoDB Chat Memory node that fails to validate the sessionId parameter. Unauthenticated attackers can supply MongoDB query operators in the sessionId field to access conversation histories from other users and perform unauthorized write and delete operations.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | < 1.123.80, 2.0.0 – < 2.39.6, 2.40.0 – < 2.40.1 | 1.123.80 |
Advisories 1
- WID-SEC-2026-3393 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 1, 2026
References
- GitHub Security Advisory (GHSA-w24g-6454-7w7f) vendor-advisory
- VulnCheck Advisory: n8n before 1.123.80, 2.39.6, and 2.40.1 NoSQL Injection via MongoDB Chat Memory third-party-advisory