CVE-2026-40252 MEDIUM

CVE-2026-40252: Broken Access Control (IDOR) Leading to Cross-Tenant Application Access in FastGPT

Vendor Labring
Product FastGPT
Weakness CWE-284
Published April 10, 2026
Last update April 13, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

FastGPT is an AI Agent building platform. Prior to 4.14.10.4, Broken Access Control vulnerability (IDOR/BOLA) allows any authenticated team to access and execute applications belonging to other teams by supplying a foreign appId. While the API correctly validates the team token, it does not verify that the requested application belongs to the authenticated team. This leads to cross-tenant data exposure and unauthorized execution of private AI workflows. This vulnerability is fixed in 4.14.10.4.

Key dates

02Disclosure timeline

April 10, 2026 CVE published
April 13, 2026 Record updated