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CVE-2026-54449— LangBot: Authenticated RCE Via MCP Configuration

Quick assessment

Affected
langbot-app LangBot
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LangBot HQ LangBot是LangBot HQ组织的一款人工智能对话助手。 LangBot HQ LangBot 4.10.7及之前版本存在命令注入漏洞，该漏洞源于STDIO MCP服务器配置缺少适当的授权边界，且src/langbot/pkg/provider/tools/loaders/mcp.py中的StdioServerParameters接受配置的命令和参数并启动服务端子进程，可能导致已认证攻击者利用扩展MCP配置以LangBot服务权限执行任意命令，造成数据泄露、数据修改和服务中断

CVSS 8.8 · High EPSS 0.72% · P53

Affected Version Matrix 1

VendorProduct Version RangeStatus
langbot-app LangBot <= 4.10.7 affected
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I. Basic Information for CVE-2026-54449

Vulnerability Information
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Vulnerability Title
LangBot: Authenticated RCE Via MCP Configuration
Source: CVE Program / CVE List V5
Vulnerability Description
LangBot is a global IM bot platform designed for LLMs. In version 4.10.7 and earlier, any authenticated user can add or change an STDIO MCP server configuration without an adequate authorization boundary. In src/langbot/pkg/provider/tools/loaders/mcp.py, StdioServerParameters accepts the configured command and arguments and starts a server-side subprocess on the LangBot server. An attacker who can sign up or obtain an account can use the Extensions MCP configuration to execute arbitrary commands with the privileges of the LangBot service, enabling data disclosure, modification, and service disruption. No fixed version is available as of this review.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
LangBot HQ LangBot 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LangBot HQ LangBot是LangBot HQ组织的一款人工智能对话助手。 LangBot HQ LangBot 4.10.7及之前版本存在命令注入漏洞，该漏洞源于STDIO MCP服务器配置缺少适当的授权边界，且src/langbot/pkg/provider/tools/loaders/mcp.py中的StdioServerParameters接受配置的命令和参数并启动服务端子进程，可能导致已认证攻击者利用扩展MCP配置以LangBot服务权限执行任意命令，造成数据泄露、数据修改和服务中断
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

Vendor Product Affected Versions CPE Subscribe
langbot-app LangBot <= 4.10.7 -

II. Public POCs for CVE-2026-54449

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7069 chars
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III. Intelligence Information for CVE-2026-54449

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Vendor Advisories for CVE-2026-54449 (1)

IV. Related Vulnerabilities

Same product: LangBot
Same vendor: langbot-app
Same weakness: CWE-77

V. Comments for CVE-2026-54449

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