VulnCheck KEV: CVE-2026-42271

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. From version 1.74.2 to before version 1.83.7, two endpoints used to preview an MCP server before saving it — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accepted a full server configuration i...

CVE-2026-42271

Summary: CVE-2026-42271 affects LiteLLM up to v1.83.7, where two MCP preview endpoints (POST /mcp-rest/test/connection and /tools/list) could spawn arbitrary commands via stdio transport when provided a full server config, restricted only by a valid API key. The subprocess ran with the proxy’s pr...

CVE-2026-42271 LiteLLM: Authenticated command execution via MCP stdio test endpoints

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. From version 1.74.2 to before version 1.83.7, two endpoints used to preview an MCP server before saving it — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accepted a full server configuration i...