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 unauthenticated attacker to pass a MongoDB query operator object e.g., "$ne": "" as the password field. This NoSQL...

CVE-2026-40351

Summary: CVE-2026-40351 affects FastGPT. In versions prior to 4.14.9.5, the password login endpoint uses TypeScript type assertions without runtime validation, allowing an unauthenticated attacker to provide a MongoDB query operator as the password (e.g., {"$ne": ""}), bypassing authentication an...