Vulnerability DatabaseCVE-2026-56276
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CVE-2026-56276
Published:June 20, 2026
Updated:August 04, 2026
Flowise before 3.1.2 contains a mass assignment vulnerability in the PUT /api/v1/user endpoint that allows authenticated users to directly modify the credential field without validation. Attackers can bypass password change verification and session invalidation by supplying a crafted password hash, establishing persistent account access after temporary session compromise.
Related Resources (5)
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39
https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override
https://nvd.nist.gov/vuln/detail/CVE-2026-56276
https://github.com/FlowiseAI/Flowise
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56276.json
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CVSS v4
Base Score:
6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-915
EPSS
Base Score:
0.37