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CVE-2026-39423— Stored XSS via Eval Injection in EchartsRander Component

EPSS 0.03% · P9
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I. Basic Information for CVE-2026-39423

Vulnerability Information
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Vulnerability Title
Stored XSS via Eval Injection in EchartsRander Component
Source: NVD (National Vulnerability Database)
Vulnerability Description
MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an Eval Injection vulnerability in the Markdown rendering engine that allows any user capable of interacting with the AI chat interface to execute arbitrary JavaScript in the browsers of other users, including administrators, resulting in Stored Cross-Site Scripting (XSS). This issue has been fixed in version 2.8.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
MaxKB 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MaxKB是1Panel-dev开源的一款基于大语言模型和 RAG 的开源知识库问答系统。 MaxKB 2.7.1及之前版本存在安全漏洞，该漏洞源于Markdown渲染引擎存在Eval注入漏洞，可能导致能够与AI聊天界面交互的任何用户在其他用户浏览器中执行任意JavaScript。
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

VendorProductAffected VersionsCPESubscribe
1Panel-devMaxKB < 2.8.0 -

II. Public POCs for CVE-2026-39423

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III. Intelligence Information for CVE-2026-39423

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Same Patch Batch · 1Panel-dev · 2026-04-14 · 10 CVEs total

CVE-2026-394206.3 MEDIUMMaxKB: Sandbox escape via LD_PRELOAD bypass
CVE-2026-394216.3 MEDIUMMaxKB: Sandbox escape via ctypes and unhooked SYS_pkey_mprotect
CVE-2026-394185.0 MEDIUMMaxKB: SSRF via sandbox network hook bypass
CVE-2026-394174.6 MEDIUMMaxKB: RCE via MCP stdio command injection in workflow engine
CVE-2026-394193.1 LOWMaxKB: Sandbox Result Validation Bypass via Tool Output Spoofing
CVE-2026-39424MaxKB has CSV Injection in its Application Chat Export Functionality
CVE-2026-39425MaxKB: Stored XSS via Unsanitized html_rander Tags in Markdown Rendering
CVE-2026-39426MaxKB: Stored XSS via Unsanitized iframe_render Parsing
CVE-2026-39422MaxKB has Stored XSS via ChatHeadersMiddleware

IV. Related Vulnerabilities

Same product: MaxKB
Same vendor: 1Panel-dev
Same weakness: CWE-79

V. Comments for CVE-2026-39423

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