{"id":18015,"date":"2026-09-07T20:30:37","date_gmt":"2026-09-07T12:30:37","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-86351"},"modified":"2026-09-07T20:30:37","modified_gmt":"2026-09-07T12:30:37","slug":"cve-2026-86351","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-86351","title":{"rendered":"CVE-2026-86351 &#8211; Affected versions of MISP validate the user-configurable homepage by checking only whether"},"content":{"rendered":"<p>Affected versions of MISP validate the user-configurable homepage by checking only whether the supplied path begins with \/. That check is insufficient because protocol-relative URLs such as \/\/attacker.example also begin with \/ but resolve to an external origin in browsers.<\/p>\n<p>The vulnerable homepage value can be stored as a user setting and later used by the post-login routing logic. The commit explicitly identifies \/\/attacker.example as a payload that passed validation and was emitted to the Location header after login.<\/p>\n<p>The fix introduces a shared InternalRedirectValidator that rejects URLs containing a host, scheme, userinfo, unsafe leading \/\/ or \/, malformed URLs, and control characters. It also revalidates homepage settings on read so legacy or internally written unsafe values cannot bypass the new storage-time validation.<\/p>\n<p>Version affected: \u22642.5.45<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Affected versions of MISP validate the user-configurable homepage by checking only whether the supplied path begins with \/. That check is insufficient because protocol-relative URLs such as \/\/attacker<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-18015","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/18015","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=18015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}