CVE-2026-40352— FastGPT: NoSQL Injection in updatePasswordByOld Leads to Account Takeover
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I. Basic Information for CVE-2026-40352
Vulnerability Information
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Vulnerability Title
FastGPT: NoSQL Injection in updatePasswordByOld Leads to Account Takeover
Source: NVD (National Vulnerability Database)
Vulnerability Description
FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password change endpoint is vulnerable to NoSQL injection. An authenticated attacker can bypass the "old password" verification by injecting MongoDB query operators. This allows an attacker who has gained a low-privileged session to change the password of their account (or others if combined with ID manipulation) without knowing the current one, leading to full account takeover and persistence. This issue has been fixed in version 4.14.9.5.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
数据查询逻辑中特殊元素的不当中和
Source: NVD (National Vulnerability Database)
Vulnerability Title
FastGPT 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.14.9.5之前版本存在安全漏洞，该漏洞源于密码更改端点容易受到NoSQL注入攻击，可能导致经过身份验证的攻击者通过注入MongoDB查询运算符绕过旧密码验证，从而完全接管账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-40352
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IV. Related Vulnerabilities
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FastGPT: Stored MCP tool URL SSRF in FastGPT workflow execut - CVE-2026-42345
FastGPT: Cloud metadata endpoint SSRF protection bypass via - CVE-2026-42344
FastGPT: DNS rebinding TOCTOU bypass in isInternalAddress al - CVE-2026-42343
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Same weakness: CWE-943
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