{"id":14561,"date":"2026-09-04T19:02:03","date_gmt":"2026-09-04T11:02:03","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-52869"},"modified":"2026-09-04T19:02:03","modified_gmt":"2026-09-04T11:02:03","slug":"cve-2026-52869","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-52869","title":{"rendered":"CVE-2026-52869 [HIGH] &#8211; The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Pr"},"content":{"rendered":"<p>The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to 1.27.2, the SSE and stateful Streamable HTTP transports mcp.server.sse.SseServerTransport and mcp.server.streamable_http_manager.StreamableHTTPSessionManager route requests to existing sessions using only the session_id query parameter or Mcp-Session-Id header without verifying the authenticated principal that created the session, allowing a different bearer-token-authenticated client with a known session ID to inject JSON-RPC messages into that session. This issue is fixed in version 1.27.2.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to 1.27.2, the SSE and stateful Streamable HTTP transports mcp.server.sse.SseServerTranspo<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-14561","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/14561","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14561"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14561"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}