CVE Tools
Sign in

CVE-2026-40351

FastGPT: NoSQL Injection in loginByPassword leads to Authentication Bypass

Published: Apr 17, 2026Updated: Apr 27, 2026 Sources: CVE List NVDCWE-943
9.8CRITICAL
NVD MITRE
EPSS Score
0.6%
Top 53.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-943

Affected Products

labring
commercial
FastGPTSaaS
AI / ML / llm-serving-inference
fastgpt
commercial
fastgptSaaS
AI / ML / llm-serving-inference

Exploitability

Official Patch Available
Workaround Available
Is your org exposed to CVE-2026-40351?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xg
github.com
https://github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2d
github.com
https://github.com/labring/FastGPT/releases/tag/v4.14.9.5
github.com

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-40351 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows