NoSQL Injection Vulnerability in Flowise by FlowiseAI
CVE-2026-91937

8.7HIGH

Key Information:

Vendor

Flowiseai

Status
Flowise
Vendor
CVE Published:
15 September 2026

What is CVE-2026-91937?

Flowise versions prior to 3.1.4 are vulnerable to a NoSQL injection attack due to improper sanitization of the overrideConfig.sessionId parameter. This flaw allows unauthenticated attackers to construct malicious MongoDB operator objects through the prediction API. By exploiting this vulnerability, attackers can gain unauthorized access to chat history records from a shared MongoDB collection, potentially exposing sensitive user information.

Affected Version(s)

Flowise 0 < 3.1.4

Flowise 3.1.4

References

https://github.com/FlowiseAI/Flowise/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/flowise-before-3.1.4...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

DongShuaike
.