CVE-2026-40252: Fastgpt

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Fastgpt Fastgpt: before 4.14.10.4 (fixed in 4.14.10.4)

Published 2026-04-10. Last modified 2026-06-17.