CVE-2026-40352: Fastgpt

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password change endpoint is vulnerable to NoSQL injection. An authenticated attacker can bypass the "old password" verification by injecting MongoDB query operators. This allows an attacker who has gained a low-privileged session to change the password of their account (or others if combined with ID manipulation) without knowing the current one, leading to full account takeover and persistence. This issue has been fixed in version 4.14.9.5.

Affected products

• Fastgpt Fastgpt: before 4.14.9.5 (fixed in 4.14.9.5)

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