Vulnerability in N8n-Io N8n
CVE-2026-103250
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-w24g-6454-7w7f (vendor-advisory)
- www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-nosql-inject… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103250?
- CVE-2026-103250 is a high-severity vulnerability in N8n-Io N8n, classified under Improper Neutralization of Special Elements in Data Query Logic. CVSS score: 8.1/10. Published 2026-10-01.
- How severe is CVE-2026-103250?
- High severity. CVSS v3 base score is 8.1 out of 10.