{"id":24836,"date":"2026-09-17T00:32:16","date_gmt":"2026-09-16T16:32:16","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63127"},"modified":"2026-09-17T00:32:16","modified_gmt":"2026-09-16T16:32:16","slug":"cve-2026-63127","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63127","title":{"rendered":"CVE-2026-63127 [HIGH] &#8211; RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.0.0, the rmcp crat"},"content":{"rendered":"<p>RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.0.0, the rmcp crate&#8217;s OAuth implementation in crates\/rmcp\/src\/transport\/auth.rs omits the RFC 9728 resource field from ResourceServerMetadata and allows discover_oauth_server_via_resource_metadata to use protected-resource metadata without confirming that the returned resource identifier exactly matches the configured MCP server. A malicious MCP server can publish metadata for a different legitimate MCP resource and its authorization server, causing a victim who connects and completes the authorization flow to obtain a legitimate access token that the client subsequently sends to the malicious server. The attacker can capture the token and impersonate the victim against the legitimate MCP resource within the token&#8217;s granted scopes. This issue is fixed in version 2.0.0.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.0.0, the rmcp crate&#8217;s OAuth implementation in crates\/rmcp\/src\/transport\/auth.rs omits the RFC 9728 resource field from ResourceS<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24836","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24836","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=24836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}