{"id":29719,"date":"2026-09-27T00:31:32","date_gmt":"2026-09-26T16:31:32","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100639"},"modified":"2026-09-27T00:31:32","modified_gmt":"2026-09-26T16:31:32","slug":"cve-2026-100639","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100639","title":{"rendered":"CVE-2026-100639 [HIGH] &#8211; SiYuan v3.8.3 fails to HTML-escape the data-subtype attribute when generating gutter-butto"},"content":{"rendered":"<p>SiYuan v3.8.3 fails to HTML-escape the data-subtype attribute when generating gutter-button markup (app\/src\/protyle\/gutter\/button.ts, assigned via innerHTML in app\/src\/protyle\/gutter\/index.ts) from content pasted as plain-text Markdown containing a Kramdown inline attribute list (IAL). Because the shared Lute renderer parses Kramdown IAL from text\/plain input, an attacker-supplied Markdown snippet using entity-encoded quotes in data-subtype breaks out of the attribute value when the gutter markup is re-parsed by the browser, injecting additional attributes such as autofocus and onfocus. If a victim pastes the crafted Markdown and the affected gutter control receives focus, the injected handler executes; in the Electron desktop application, where the main BrowserWindow enables Node integration and disables context isolation, this results in JavaScript execution with renderer Node.js privileges (remote code execution). Fixed in v3.8.4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SiYuan v3.8.3 fails to HTML-escape the data-subtype attribute when generating gutter-button markup (app\/src\/protyle\/gutter\/button.ts, assigned via innerHTML in app\/src\/protyle\/gutter\/index.ts) from co<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29719","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29719","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=29719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}