Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-40351

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 18.8%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2026-40351


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