{"id":22225,"date":"2026-09-14T20:30:44","date_gmt":"2026-09-14T12:30:44","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-8821"},"modified":"2026-09-14T20:30:44","modified_gmt":"2026-09-14T12:30:44","slug":"cve-2026-8821","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-8821","title":{"rendered":"CVE-2026-8821 [HIGH] &#8211; Mattermost versions 11.9.x"},"content":{"rendered":"<p>Mattermost versions 11.9.x &lt;= 11.9.0, 11.8.x &lt;= 11.8.4, 11.7.x &lt;= 11.7.7, 10.11.x &lt;= 10.11.22 fail to validate channel member-management permission during playbook run creation, allowing an authenticated channel member to add an arbitrary user to a restricted channel via the run owner field.. Mattermost Advisory ID: MMSA-2026-00677<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mattermost versions 11.9.x<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-22225","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/22225","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=22225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}