CVE-2026-40351

Published: Apr 17, 2026Modified: Jun 17, 2026

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: security-advisories@github.com (Secondary)

Description

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 object (e.g., {"$ne": ""}) as the password field. This NoSQL injection bypasses the password check, enabling login as any user including the root administrator. This issue has been fixed in version 4.14.9.5.

Affected (1)

Products: Fastgpt: Fastgpt

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Fastgpt Fastgpt	Before 4.14.9.5

Related CWEs

Improper Neutralization of Special Elements in Data Query Logic

The product generates a query intended to access or manipulate data in a data store such as a database, but it does not neutralize or incorrectly neutralizes special elements that can modify the intended logic of the query.

References (3)

https://github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2d

Source: security-advisories@github.com

Patch

https://github.com/labring/FastGPT/releases/tag/v4.14.9.5

Source: security-advisories@github.com

ProductRelease Notes

https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xg

Source: security-advisories@github.com

ExploitMitigationVendor Advisory

Timeline

No history available yet.