CVE-2026-26003— FastGPT Plugin forwarding request is not authenticated, posing a serious risk of attack
Quick assessment
Affected
labring FastGPT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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 4.14.0版本至4.14.5版本存在输入验证错误漏洞，该漏洞源于未经身份验证即可直接访问插件系统，可能导致插件系统崩溃和安装状态丢失。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-26003
Vulnerability Information
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Vulnerability Title
FastGPT Plugin forwarding request is not authenticated, posing a serious risk of attack
Source: CVE Program / CVE List V5
Vulnerability Description
FastGPT is an AI Agent building platform. From 4.14.0 to 4.14.5, attackers can directly access the plugin system through FastGPT/api/plugin/xxx without authentication, thereby threatening the plugin system. This may cause the plugin system to crash and the loss of plugin installation status, but it will not result in key leakage. For older versions, as there are only operation interfaces for obtaining information, the impact is almost negligible. This vulnerability is fixed in 4.14.5-fix.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
FastGPT 输入验证错误漏洞
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 4.14.0版本至4.14.5版本存在输入验证错误漏洞，该漏洞源于未经身份验证即可直接访问插件系统，可能导致插件系统崩溃和安装状态丢失。
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-2026-26003
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V. Comments for CVE-2026-26003
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