PT-2026-51151 · Flowise · Flowise

Berkdedekarginoglu · Published 2026-06-20 · Updated 2026-06-20 · CVE-2026-56276

Positive Technologies (AI Summary)

CVSS v4.0

6.0

Medium

Base vector

AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Flowise versions prior to 3.1.2

Description A mass assignment issue exists in the 'PUT /api/v1/user' endpoint. This allows authenticated users to modify the credential field without proper validation. By providing a crafted password hash, an attacker can bypass password change verification and session invalidation, enabling persistent account access following a temporary session compromise. Mass assignment occurs when an application takes user-provided data and binds it to an internal object without filtering, allowing users to modify fields they should not have access to.

Recommendations Update to version 3.1.2 or later. As a temporary workaround, restrict access to the 'PUT /api/v1/user' endpoint or avoid using the credential parameter until the update is applied.

Fix

Weakness Enumeration

CWE-915

Related Identifiers

CVE-2026-56276

Affected Products

Flowise

References · 5

• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-59fh-9f3p-7m39 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56276 · Security Note
• https://vulncheck.com/advisories/flowise-mass-assignment-in-put-api-v1-user-allows-password-hash-override · Note
• https://twitter.com/CVEnew/status/2068380909028462853 · Twitter Post
• https://twitter.com/infoflowcloud/status/2068382460560146679 · Twitter Post