{"id":22232,"date":"2026-09-14T20:30:44","date_gmt":"2026-09-14T12:30:44","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90898"},"modified":"2026-09-14T20:30:44","modified_gmt":"2026-09-14T12:30:44","slug":"cve-2026-90898","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90898","title":{"rendered":"CVE-2026-90898 [CRITICAL] &#8211; Bifrost registers MCP clients through its management API. A stdio client is a command plus"},"content":{"rendered":"<p>Bifrost registers MCP clients through its management API. A stdio client is a command plus args. Bifrost starts that program in the gateway the moment the client is added. No MCP handshake required.<\/p>\n<p>The default is governance.auth_config.is_enabled=false. Auth off means every caller is a local admin. One unauthenticated POST \/api\/mcp\/client is enough to run a program as the Bifrost process user (appuser on the official image).<\/p>\n<p>\u00a0transports\/v2.1.0 refuses an unauthenticated stdio registration with 403. transports\/v2.0.0 still allows it.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bifrost registers MCP clients through its management API. A stdio client is a command plus args. Bifrost starts that program in the gateway the moment the client is added. No MCP handshake required.<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-22232","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/22232","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=22232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}