Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck
CVE-2026-91937Flowise before 3.1.4 NoSQL Injection via sessionId
High 7.5
In plain English
A high-severity security flaw in Flowise from FlowiseAI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 59.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Flowise before 3.1.4 fails to sanitize the overrideConfig.sessionId parameter before using it in MongoDB queries within the MongoDBMemory node. Unauthenticated attackers can submit MongoDB operator objects through the prediction API to read chat history records belonging to other users from the shared collection.
Affected products (as reported)
Weakness: CWE-943 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- GitHub Security Advisory (GHSA-wpvf-4vfx-rgxm) vendor-advisory
- VulnCheck Advisory: Flowise before 3.1.4 NoSQL Injection via sessionId third-party-advisory