FastGPT — Sql Injection (CVE-2026-40351)
Date: 2026-04
Affected: fastgpt/fastgpt
Attack vector: sql-injection
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2026-34162
CVE-2026-34163
CVE-2026-40351
CVE-2026-40352
CWE: CWE-306
CWE-918
CWE-943
CVSS: 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

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.


Mitigations:

Architectural layers (MAESTRO):