# CVE-2026-40351

> Vulnerability · severity: **CRITICAL** (CVSS 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.

## Key facts

- **CVE ID:** CVE-2026-40351
- **Published:** 2026-04-17
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.8
- **CWE codes:** CWE-943

## Affected products

- `fastgpt:fastgpt`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40351

## Citation

> AI Analytics. CVE-2026-40351. Retrieved 2026-07-23 from https://api.ai-analytics.org/cve/CVE-2026-40351. Derived from NIST NVD. Licensed CC0.

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