CVE-2026-41267

Flowise: Improper Mass Assignment in Account Registration Enables Unauthorized Organization Association

State: Published
Severity: 8.1 High
Published: Apr 23, 2026
Updated: Apr 23, 2026
Reserved: Apr 18, 2026

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, an improper mass assignment (JSON injection) vulnerability in the account registration endpoint of Flowise Cloud allows unauthenticated attackers to inject server-managed fields and nested objects during account creation. This enables client-controlled manipulation of ownership metadata, timestamps, organization association, and role mappings, breaking trust boundaries in a multi-tenant environment. This vulnerability is fixed in 3.1.0.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key
CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

Affected Products

Product	Versions
FlowiseFlowiseAI	< 3.1.0Affected

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-48m6-ch88-55mj

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