CVE-2026-103250n8n before 1.123.80, 2.39.6, and 2.40.1 NoSQL Injection via MongoDB Chat Memory
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EPSS puts the chance of exploitation in the next 30 days at 0.20%, higher than 9% of scored CVEs.
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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.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L
- Weakness (CWE)
- CWE-943
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.20% (percentile 9)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n8n-io n8n n8n_io:n8n (from the name) | before 1.123.80; from 2.0.0 before 2.39.6; from 2.40.0 before 2.40.1 | CNA record |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-w24g-6454-7w7fvendor-advisory
- https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-nosql-injection-via-mongodb-chat-memorythird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.