{"id":8138,"date":"2026-09-04T18:49:51","date_gmt":"2026-09-04T10:49:51","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-9816"},"modified":"2026-09-04T18:49:51","modified_gmt":"2026-09-04T10:49:51","slug":"cve-2026-9816","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-9816","title":{"rendered":"CVE-2026-9816 [HIGH] &#8211; Mattermost versions 11.7.x"},"content":{"rendered":"<p>Mattermost versions 11.7.x &lt;= 11.7.6, 10.11.x &lt;= 10.11.21, 11.8.x &lt;= 11.8.3 fail to validate BoardMember.Scheme* fields server-side on insert and archive-import paths which allows a board editor or non-guest team member to grant board admin to arbitrary users via POST \/api\/v2\/boards\/{boardID}\/members and POST \/api\/v2\/teams\/{teamID}\/archive\/import.. Mattermost Advisory ID: MMSA-2026-00685<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mattermost versions 11.7.x<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-8138","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/8138","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=8138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}