CVE-2026-40252

Broken Access Control (IDOR) Leading to Cross-Tenant Application Access in FastGPT

State: Published
Severity: 5.3 Medium
Published: Apr 10, 2026
Updated: Apr 13, 2026
Reserved: Apr 10, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	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	GitHub_M

Weaknesses

CWE-284 Improper Access Control
CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
FastGPTlabring	< 4.14.10.4Affected

References

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