CVE-2026-56276 Details
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.
A mass assignment vulnerability has been identified in Flowise versions prior to 3.1.2, specifically in the PUT /api/v1/user endpoint. This vulnerability allows authenticated users to directly modify the credential field, which includes the password hash, without any validation. By supplying a crafted password hash, attackers can bypass the password change verification process and session invalidation, leading to persistent access to the account after a temporary session compromise.
Users can update to Flowise version 3.1.2 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 20, 2026CISA-ADP
Assessed Jun 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39 | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-915 | Improperly Controlled Modification of Dynamically-Determined Object Attributes | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Flowise | <= 3.1.1 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 22, 2026 | CVE Modified | CISA-ADP |
| Jun 20, 2026 | New CVE Received | [email protected] |