CVE-2026-40351
Last modified
CVE-2026-40351 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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., {"$ne": ""}) as the password field. EPSS estimates a 0.63% chance of exploitation in the next 30 days.
Description
FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password-based login endpoint uses TypeScript type assertion without runtime validation, allowing an unauthenticated attacker to pass a MongoDB query operator object (e.g., {"$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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fastgpt | Fastgpt | < 4.14.9.5 |
References
- https://github.com/labring/FastGPT/releases/tag/v4.14.9.5Product, Release Notes
- https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xgExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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