CVE-2026-41267
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.
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Flowise versions prior to 3.1.0 contain a mass assignment vulnerability in the account registration process. An unauthenticated attacker can inject server-side fields to gain unauthorized administrative roles or associate their account with other organizations in multi-tenant environments. Teams using Flowise to orchestrate LLM workflows should update to version 3.1.0 immediately to prevent account takeover and privilege escalation.
Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCWE-639CWE-915EPSS
Affects
flowiseai:flowiseTechnical 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.