{"id":4225,"date":"2026-09-04T18:43:07","date_gmt":"2026-09-04T10:43:07","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-27145"},"modified":"2026-09-04T18:43:07","modified_gmt":"2026-09-04T10:43:07","slug":"cve-2026-27145","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-27145","title":{"rendered":"CVE-2026-27145 [MEDIUM] &#8211; (*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS"},"content":{"rendered":"<p>(*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, &#8220;.&#8221;) to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostname&#8217;s label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>(*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, &#8220;.&#8221;) to execute repeatedly on the sam<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-4225","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/4225","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=4225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}