{"id":18160,"date":"2026-09-08T08:30:37","date_gmt":"2026-09-08T00:30:37","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-82754"},"modified":"2026-09-08T08:30:37","modified_gmt":"2026-09-08T00:30:37","slug":"cve-2026-82754","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-82754","title":{"rendered":"CVE-2026-82754 &#8211; Improper Protection of Alternate Path vulnerability in ash-project ash_authentication_oaut"},"content":{"rendered":"<p>Improper Protection of Alternate Path vulnerability in ash-project ash_authentication_oauth2_server exposes the state-changing OAuth endpoints under an unintended URL prefix, bypassing controls scoped to the canonical prefix.<\/p>\n<p>oauth2_server_protocol_routes\/1 in AshAuthentication.Phoenix.Oauth2Server.Router forwards the same ProtocolRouter at both the \/oauth prefix and the \/.well-known prefix. Phoenix forward strips the matched prefix before dispatch, so the full route table answers under both mounts, and POST \/register, POST \/token, and POST \/revoke are reachable as \/.well-known\/register, \/.well-known\/token, and \/.well-known\/revoke. Edge controls such as WAF rules, rate limits, or authentication exemptions written against the \/oauth paths, or that allow-list \/.well-known as unauthenticated, do not apply to the alias.<\/p>\n<p>This issue affects ash_authentication_oauth2_server: from 0.1.0 before 0.3.1.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Improper Protection of Alternate Path vulnerability in ash-project ash_authentication_oauth2_server exposes the state-changing OAuth endpoints under an unintended URL prefix, bypassing controls scoped<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-18160","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/18160","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=18160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}