CVE-2026-91937: Flowiseai Flowise

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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

• Flowiseai Flowise: before 3.1.4 (fixed in 3.1.4)

Published 2026-09-15. Last modified 2026-09-23.