{"id":53299,"date":"2026-05-12T05:01:08","date_gmt":"2026-05-12T05:01:08","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=53299"},"modified":"2026-05-12T05:01:08","modified_gmt":"2026-05-12T05:01:08","slug":"rce-in-code-runner-mcp-server","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=53299","title":{"rendered":"RCE in Code Runner MCP Server_CVE-2026-5029"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A remote code execution vulnerability exists in\u00a0Code Runner MCP Server when run with the &#8211;transport http option, which exposes the \/mcp JSON-RPC endpoint without authentication on port 3088. An unauthenticated remote attacker can invoke the run-code MCP tool to supply arbitrary source code and execute it via child_process.exec() using the specified language interpreter. This allows execution of arbitrary code with the privileges of the user running the server. 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