CVE-2026-32625
CriticalCVSS 9.6Exploitation Probability (EPSS)
High risk86th percentile - higher than 86% of all known CVEs
Summary
LibreChat up to version 0.8.3 has a vulnerability in the MCP server integration that resolves ${VAR} placeholders from process.env during Zod schema validation of user-supplied MCP URLs. An authenticated user can create a malicious MCP configuration that sends critical secrets (CREDS_KEY, CREDS_IV, JWT_SECRET, MONGO_URI) to an attacker-controlled server.
Risk Assessment
An attacker can compromise cryptographic materials and database credentials, enabling full installation takeover without administrative privileges.
Recommendation
Immediately update LibreChat to version 0.8.4-rc1 or later and restrict MCP server access to trusted sources.
Original NVD description (English source)
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.