{"id":29721,"date":"2026-09-27T00:31:32","date_gmt":"2026-09-26T16:31:32","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100641"},"modified":"2026-09-27T00:31:32","modified_gmt":"2026-09-26T16:31:32","slug":"cve-2026-100641","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100641","title":{"rendered":"CVE-2026-100641 [HIGH] &#8211; SiYuan before v3.8.4 does not HTML-escape stored flashcard block content before interpolat"},"content":{"rendered":"<p>SiYuan before v3.8.4 does not HTML-escape stored flashcard block content before interpolating it into the card-manager list markup. Block content returned by \/api\/riff\/getRiffCards is inserted into a card item template in app\/src\/card\/viewCards.ts and assigned to listElement.innerHTML, so content such as <img decoding=\"async\" src=\"invalid\"> becomes an executable event-handler attribute. Because the SiYuan desktop (Electron) main window is created with nodeIntegration enabled and contextIsolation disabled, an administrator who opens the card manager on a workspace containing attacker-supplied flashcard content (for example introduced through contribution or import) executes the attacker&#8217;s script in a privileged renderer, which can lead to arbitrary code execution on the host. The affected endpoint remains behind authentication and administrator-role checks; this is an untrusted-content-to-privileged-renderer issue, not an authorization bypass.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SiYuan before v3.8.4 does not HTML-escape stored flashcard block content before interpolating it into the card-manager list markup. Block content returned by \/api\/riff\/getRiffCards is inserted into a <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29721","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29721","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=29721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}