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CVE-2026-32625— LibreChat Exfiltrates Server Secrets via MCP Server URL Injection

Quick assessment

Affected
danny-avila LibreChat
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.

LibreChat是LibreChat开源的一个免费、高度可定制的统一 AI 对话平台，能够在一个界面中聚合并运行来自任意厂商的大模型。 LibreChat 0.8.3及之前版本存在信息泄露漏洞，该漏洞源于MCP服务器集成在Zod模式验证期间解析环境变量占位符，任何经过身份验证的用户可创建恶意MCP服务器配置，导致服务器向攻击者域传输CREDS_KEY、CREDS_IV、JWT_SECRET和MONGO_URI等关键秘密。

CVSS 9.6 · Critical EPSS 0.41% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
danny-avila LibreChat < 0.8.4-rc1 affected
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I. Basic Information for CVE-2026-32625

Vulnerability Information
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Vulnerability Title
LibreChat Exfiltrates Server Secrets via MCP Server URL Injection
Source: CVE Program / CVE List V5
Vulnerability Description
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.8.3, the Model Context Protocol (MCP) server integration resolves ${VAR} placeholders against the server's process.env during Zod schema validation of user-supplied MCP server URLs. Any authenticated user can create a malicious MCP server configuration with a URL pointing to an attacker-controlled domain containing environment variable references, causing the LibreChat server to connect to the attacker's server and transmit critical secrets such as CREDS_KEY, CREDS_IV, JWT_SECRET, and MONGO_URI in the request URL. This enables full compromise of the installation's cryptographic materials and database credentials without requiring administrative privileges. This is patched in version 0.8.4-rc1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
LibreChat 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreChat是LibreChat开源的一个免费、高度可定制的统一 AI 对话平台，能够在一个界面中聚合并运行来自任意厂商的大模型。 LibreChat 0.8.3及之前版本存在信息泄露漏洞，该漏洞源于MCP服务器集成在Zod模式验证期间解析环境变量占位符，任何经过身份验证的用户可创建恶意MCP服务器配置，导致服务器向攻击者域传输CREDS_KEY、CREDS_IV、JWT_SECRET和MONGO_URI等关键秘密。
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
danny-avila LibreChat < 0.8.4-rc1 -

II. Public POCs for CVE-2026-32625

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6951 chars
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III. Intelligence Information for CVE-2026-32625

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Vendor Advisories for CVE-2026-32625 (1)

Same Patch Batch · danny-avila · 2026-06-02 · 4 CVEs total

CVE-2026-31942 7.1 HIGH LibreChat has IDOR in API Keys Management that allows any authenticated user to overwrite
CVE-2026-44653 6.5 MEDIUM LibreChat Shared MCP Server View Leaks Decrypted Admin Secrets
CVE-2026-44654 LibreChat: Shared-agent editor can globally delete owner's file records — breaks owner's o

IV. Related Vulnerabilities

Same product: LibreChat
Same vendor: danny-avila
Same weakness: CWE-200

V. Comments for CVE-2026-32625

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