Critical severity9.8NVD Advisory· Published Apr 17, 2026· Updated Apr 27, 2026
CVE-2026-40351
CVE-2026-40351
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.
AI Insight
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Affected products
2Patches
Vulnerability mechanics
References
3- github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2dnvdPatch
- github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xgnvdExploitMitigationVendor Advisory
- github.com/labring/FastGPT/releases/tag/v4.14.9.5nvdProductRelease Notes
News mentions
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