{"id":13518,"date":"2026-09-04T19:00:47","date_gmt":"2026-09-04T11:00:47","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-55213"},"modified":"2026-09-04T19:00:47","modified_gmt":"2026-09-04T11:00:47","slug":"cve-2026-55213","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-55213","title":{"rendered":"CVE-2026-55213 [HIGH] &#8211; h2o is an HTTP server with support for HTTP\/1.x, HTTP\/2 and HTTP\/3. Prior to commit edd7a1"},"content":{"rendered":"<p>h2o is an HTTP server with support for HTTP\/1.x, HTTP\/2 and HTTP\/3. Prior to commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1, when h2o processes a QPACK instruction sent from the peer over HTTP\/3, lib\/http3\/qpack.c might allocate an on-stack buffer as large as approximately 800 KB by calling alloca, which exceeds the default pthread stack size used by musl libc and causes the h2o server to crash with a segmentation fault while touching the guard page. This issue is fixed in commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>h2o is an HTTP server with support for HTTP\/1.x, HTTP\/2 and HTTP\/3. Prior to commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1, when h2o processes a QPACK instruction sent from the peer over HTTP\/3, lib<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-13518","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/13518","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=13518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}