CVE-2026-40351 — FastGPT: NoSQL Injection in loginByPassword leads to Authentication Bypass
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…
Published: 2026-04-17 · CVSS: 9.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7