{"id":18164,"date":"2026-09-08T08:30:37","date_gmt":"2026-09-08T00:30:37","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-82758"},"modified":"2026-09-08T08:30:37","modified_gmt":"2026-09-08T00:30:37","slug":"cve-2026-82758","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-82758","title":{"rendered":"CVE-2026-82758 &#8211; Improper Authentication vulnerability in ash-project ash_authentication_oauth2_server allo"},"content":{"rendered":"<p>Improper Authentication vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to register OAuth clients even when Dynamic Client Registration is gated by an initial access token.<\/p>\n<p>resolve_secret\/3 in AshAuthentication.Oauth2Server (reached through __resolve_secret__!) treated any return other than {:ok, _} or :error from a configured {module, function, args} or 2-arity-function secret provider as a valid secret, wrapping nil, false, or &#8220;&#8221; as {:ok, value}. When the initial_access_token resolves to such an empty value, POST \/oauth\/register compares the presented bearer token against it and the comparison passes with no token supplied, so registration is open although it was configured closed. The same fail-open affected other resolved secrets such as signing_secret.<\/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 Authentication vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to register OAuth clients even when Dynamic Client Registration is gated by an <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-18164","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/18164","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=18164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}