CVE-2026-91937 Flowise - NoSQL Injection

Flowise before 3.1.4 contains a NoSQL injection caused by unsanitized overrideConfig.sessionId parameter in MongoDBMemory node, letting unauthenticated attackers read other users' chat history via prediction API.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.47% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
NoSQL Injection
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-943

Vendor fix

Upgrade to version 3.1.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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