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CVE-2026-44653— LibreChat Shared MCP Server View Leaks Decrypted Admin Secrets

CVSS 6.5 · Medium EPSS 0.28% · P20

Affected Version Matrix 1

VendorProductVersion RangeStatus
danny-avilaLibreChat< 0.8.4affected
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I. Basic Information for CVE-2026-44653

Vulnerability Information
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Vulnerability Title
LibreChat Shared MCP Server View Leaks Decrypted Admin Secrets
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, users with only `VIEW` access to an MCP server can retrieve the server's decrypted admin-managed secrets through `GET /api/mcp/servers` and `GET /api/mcp/servers/:serverName`. The returned config includes plaintext values for `apiKey.key` and `oauth.client_secret`. This allows viewers of a shared MCP server to exfiltrate the underlying provider credentials. Version 0.8..4 contains a patch. Other remediations include: never returning decrypted admin-managed secrets to non-owners; redacting apiKey.key and oauth.client_secret from all API responses consider returning only boolean presence indicators for secrets, similar to the auth-values route pattern; and, if owners need to edit configs without re-entering secrets, preserving secrets server-side and returning placeholders instead of plaintext.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过发送数据的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
LibreChat 安全漏洞
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及之前版本存在安全漏洞，该漏洞源于对MCP服务器秘密的访问控制不当，可能导致具有VIEW权限的用户检索到管理员管理的解密秘密。
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

VendorProductAffected VersionsCPESubscribe
danny-avilaLibreChat < 0.8.4 -

II. Public POCs for CVE-2026-44653

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III. Intelligence Information for CVE-2026-44653

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Other References for CVE-2026-44653 (1)

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

CVE-2026-326259.6 CRITICALLibreChat Exfiltrates Server Secrets via MCP Server URL Injection
CVE-2026-319427.1 HIGHLibreChat has IDOR in API Keys Management that allows any authenticated user to overwrite
CVE-2026-44654LibreChat: 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-201

V. Comments for CVE-2026-44653

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