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VULNERABILITIES

CVE-2026-40351 Details

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.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2d [email protected]Patch
https://github.com/labring/FastGPT/releases/tag/v4.14.9.5 [email protected]ProductRelease Notes
https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xg [email protected]ExploitMitigationVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-943Improper Neutralization of Special Elements in Data Query Logic[email protected]

Affected Products

ProductVersions
fastgpt fastgpt
< 4.14.9.5

CPE

  • cpe:2.3:a:fastgpt:fastgpt:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-40351
NVD Published Date:
Apr 17, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-40351 Details - Not Deferred