High severity · published Sep 15, 2026
CVE-2026-91937
Flowise before 3.1.4 NoSQL Injection via sessionId
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flowise · FlowiseAI
before 3.1.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91937
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91937
github.com
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-wpvf-4vfx-rgxm
www.vulncheck.com
https://www.vulncheck.com/advisories/flowise-before-3.1.4-nosql-injection-via-sessionid
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