CVE-2026-40252

High

Description

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.

SeverityHigh

CVSS8.1

Exploit probability—

ProductFastgpt

PublishedApr 10, 2026

First seenApr 10, 2026

Weakness typeCWE-284Improper access control CWE-639Authorization bypass through user-controlled key

How to fix

Update

fastgpt fastgpt4.14.10.4 or later

Affected products

Product	Affected versions	Fixed in
fastgpt fastgpt	v < 4.14.10.4	4.14.10.4

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