CVE-2026-40252HIGH 8.1EPSS p25.9%

CVE-2026-40252CVE-2026-40252

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS0.34% probability of exploitation · percentile 25.9% · 2026-06-19T12:03:05Z
Published2026-04-10
Last modified2026-04-21

Underlying weaknesses· 2

CWE-284CWE-639

References

  1. https://github.com/labring/FastGPT/releases/tag/v4.14.10.4
  2. https://github.com/labring/FastGPT/security/advisories/GHSA-gc8m-w37w-24hw

2

TypeTargetConfidenceTier
WeaknessImproper Access Controlcwe-2840%live
WeaknessAuthorization Bypass Through User-Controlled Keycwe-6390%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.