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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-40351

FastGPT: NoSQL Injection in loginByPassword leads to Authentication Bypass

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

labring FastGPT

  • < 4.14.9.5affected

References