PT-2026-40976 · Flowiseai+2 · Flowise

Published 2026-05-14 · Updated 2026-06-11 · CVE-2026-42862

Positive Technologies (AI Summary)

CVSS v4.0

7.6

High

Base vector

AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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

Description A mass assignment issue exists in the tool update endpoint. This occurs when the server does not restrict which properties a client can modify, allowing user-controlled request bodies to include fields that should be managed exclusively by the backend. Specifically, the endpoint "/api/v1/tools/{toolId}" lacks server-side validation and authorization checks, enabling authenticated users to manipulate server-controlled variables such as workspaceId, createdDate, and updatedDate. By manipulating the workspaceId variable, an attacker can reassign tools to arbitrary workspaces, which breaks tenant isolation in multi-workspace environments.

Recommendations Update to version 3.1.2.

Exploit

Fix

Improper Access Control

IDOR

Weakness Enumeration

CWE-284

CWE-639

CWE-915

Related Identifiers

CVE-2026-42862

GHSA-X5V6-PJ28-CWWM

Affected Products

Flowise

References · 9

• 🔥 https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-x5v6-pj28-cwwm · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42862.json · Exploit
• https://osv.dev/vulnerability/GHSA-x5v6-pj28-cwwm · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42862 · Security Note
• https://osv.dev/vulnerability/CVE-2026-42862 · Vendor Advisory
• https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2 · Note
• https://github.com/FlowiseAI/Flowise · Note
• https://t.me/cveNotify/167005 · Telegram Post
• https://t.me/cveNotify/166614 · Telegram Post