CVE-2026-91937 Flowise before 3.1.4 NoSQL Injection via sessionId
Unauthenticated attackers can read other users' chat history by injecting MongoDB operators into the sessionId parameter in Flowise.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91937?
CVE-2026-91937 is a high-severity vulnerability in FlowiseAI Flowise, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-943
Which versions are affected by CVE-2026-91937?
How do I fix CVE-2026-91937?
No fix has been published for CVE-2026-91937 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-91937 being exploited?
There is no known exploitation of CVE-2026-91937 in the wild and no public exploit code.
Sources
Also known as GHSA-pcg8-jx3g-5wm7, GHSA-wpvf-4vfx-rgxm.