Vulnerability in Labring Fastgpt
CVE-2026-40351
FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password-based login endpoint uses TypeScript type assertion without runtime validation, allowing an unauthenticated attacker to pass a MongoDB query operator obj…
EPSS: 0.001 (24.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Labring Fastgpt — versions < 4.14.9.5
Weakness classification (CWE)
References
- https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xg (x_refsource_CONFIRM)
- https://github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2d (x_refsource_MISC)
- https://github.com/labring/FastGPT/releases/tag/v4.14.9.5 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-40351?
- CVE-2026-40351 is a critical-severity vulnerability in Labring Fastgpt, classified under Improper Neutralization of Special Elements in Data Query Logic. CVSS score: 9.8/10. Published 2026-04-17.
- How severe is CVE-2026-40351?
- Critical severity. CVSS v3 base score is 9.8 out of 10.