CVE-2026-40352CWE-943

FastGPT: NoSQL Injection in updatePasswordByOld Leads to Account Takeover

High · published April 17, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
43.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00526 · 43.8th percentile
Weakness
CWE-943 · Improper Neutralization of Special Elements in Data Query Logic
Published
2026-04-17T21:09Z
EPSS history
Timeline
  • 17 APR 21:09Z
    FastGPT: NoSQL Injection in updatePasswordByOld Leads to Account Takeover
    cvelistv5