CVE-2026-56276
Flowise - Mass Assignment in PUT /api/v1/user Allows Password Hash Override
- State
- Published
- Severity
- 6.0 Medium
- Published
- Jun 20, 2026
- Updated
- Jun 22, 2026
- Reserved
- Jun 20, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
Weaknesses
- CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
Affected Products
| Product | Versions |
|---|---|
FlowiseFlowise |
|
References
- GHSA Advisory GHSA-59fh-9f3p-7m39vendor-advisory
- VulnCheck Advisory: Flowise - Mass Assignment in PUT /api/v1/user Allows Password Hash Overridethird-party-advisory
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