CVE-2026-40351

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/17/2026

Last Modified4/20/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-943

References

https://github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2d(security-advisories@github.com)

https://github.com/labring/FastGPT/releases/tag/v4.14.9.5(security-advisories@github.com)

https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xg(security-advisories@github.com)

IOC Correlations

No correlations recorded

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