{"id":30036,"date":"2026-09-28T04:30:51","date_gmt":"2026-09-27T20:30:51","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-101057"},"modified":"2026-09-28T04:30:51","modified_gmt":"2026-09-27T20:30:51","slug":"cve-2026-101057","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-101057","title":{"rendered":"CVE-2026-101057 [LOW] &#8211; utcp-mcp (the MCP plugin of python-utcp) through 1.1.2 connects to the HTTP and WebSocket"},"content":{"rendered":"<p>utcp-mcp (the MCP plugin of python-utcp) through 1.1.2 connects to the HTTP and WebSocket MCP server URLs given in a call template&#8217;s mcpServers configuration without the ensure_secure_url validation that the HTTP-family plugins apply, so the HTTPS\/WSS-or-loopback rule is not enforced. A call template naming a plain-HTTP, non-loopback MCP server URL is dialed as configured, exposing the MCP handshake to network interception and permitting cleartext connections to internal hosts. The mcpServers configuration is operator-authored rather than remote data, and the connection is an MCP handshake rather than an arbitrary request returning a body, which limits practical exploitation; the OAuth2 token_url credential path described in the original report was not reachable in the affected versions, because the OAuth2 handler was never invoked and the call template&#8217;s auth field was not read. Fixed in utcp-mcp 1.1.3, which validates server URLs before any connection is made.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>utcp-mcp (the MCP plugin of python-utcp) through 1.1.2 connects to the HTTP and WebSocket MCP server URLs given in a call template&#8217;s mcpServers configuration without the ensure_secure_url validation t<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-30036","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/30036","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=30036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}