CVE-2026-91937

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductFlowise

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-943CWE-943

How to fix

Update

FlowiseAI Flowise3.1.4 or later

Vendor advisories

github.com/FlowiseAI/Flowise/security/advisories/GHSA-wpvf-4vfx-rgxm

Affected products

Product	Affected versions	Fixed in
FlowiseAI Flowise	v < 3.1.4	3.1.4

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