CVE-2026-100639 SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL

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...

CVE-2026-100639 SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL

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...

EUVD-2026-87733

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...

CVE-2026-100639 SiYuan before v3.8.4 Cross-Site Scripting via Kramdown IAL

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...

PT-2026-99310

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.8.4 Description Insufficient HTML-escaping of the data-subtype attribute occurs when generating gutter-button markup from plain-text Markdown containing a Kramdown inline attribute list IAL. The Lute renderer parses...