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Change History

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-4pcc-j6m6-wcwx

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.

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CWE-200

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-4pcc-j6m6-wcwx