{"id":29419,"date":"2026-09-26T04:31:45","date_gmt":"2026-09-25T20:31:45","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-67407"},"modified":"2026-09-26T04:31:45","modified_gmt":"2026-09-25T20:31:45","slug":"cve-2026-67407","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-67407","title":{"rendered":"CVE-2026-67407 &#8211; RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14"},"content":{"rendered":"<p>RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23, Incomplete fix for CVE-2026-44838: escaperegexchar\/1 does not escape -, leaving room for an MQTT topic permission bypass. the CVE-2026-44838 fix made expandtopicpermission\/2 escape regex metacharacters in expanded topic-permission variables (escaperegex(V)), but escaperegexchar\/1 escapes  ^ $ . | ? + ( ) [ ] { } and omits -. When a topic permission template places {clientid} inside a [&#8230;] character class A low-privileged authenticated MQTT user controlling its clientid can broaden topic authorization (read and write) when templates embed {clientid} in a [&#8230;] This issue is fixed in versions 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23, Incomplete fix for CVE-2026-44838: escaperegexchar\/1 does not escape -, leaving room for an MQTT t<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29419","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29419","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=29419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}