CVE-2026-44653

NVD 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.

What to do

• Upgrade LibreChat to 0.8.4 or later.
• Do not expose the component's API or UI to the internet without authentication in front of it.

Sources

• NVD: CVE-2026-44653
• https://github.com/danny-avila/LibreChat/security/advisories/GHSA-6vqg-rgpm-qvf9Exploit · Mitigation · Vendor Advisory

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