VULNERABILITY INTELLIGENCE

CVE-2026-40351

CVSS score9.8 CRITICAL
EPSS probability0.63%
CISA KEVNot currently listed
Published2026-04-17
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-943

Primary references