CVE-2026-31809 SiYuan has a SVG Sanitizer Bypass via Whitespace in `javascript:` URI — Unauthenticated XSS

SiYuan is a personal knowledge management system. Prior to 3.5.10, SiYuan's SVG sanitizer SanitizeSVG checks href attributes for the javascript: prefix using strings.HasPrefix. However, inserting ASCII tab , newline , or carriage return characters inside the javascript: string bypasses this prefi...

CVE-2026-31807

SiYuan: CVE-2026-31807 is a real issue in SVG sanitization prior to v3.5.10. The SVG sanitizer fails to block animation elements (e.g., /) in /api/icon/getDynamicIcon (type=8), allowing injection of JavaScript and a reflected XSS. Nuclei templates detail the exact vector: unauthenticated access t...

GO-2026-4596 SiYuan: Unauthenticated Reflected XSS via SVG Injection in /api/icon/getDynamicIcon Endpoint in github.com/siyuan-note/siyuan/kernel

SiYuan: Unauthenticated Reflected XSS via SVG Injection in /api/icon/getDynamicIcon Endpoint in github.com/siyuan-note/siyuan/kernel...

CVE-2026-31809: Improper Neutralization of Input During Web Page Generation

SiYuan is a personal knowledge management system. Prior to 3.5.10, SiYuan's SVG sanitizer SanitizeSVG checks href attributes for the javascript: prefix using strings.HasPrefix. However, inserting ASCII tab , newline , or carriage return characters inside the javascript: string bypasses this prefi...

CVE-2026-29183

SiYuan Note/CMS exposes an unauthenticated reflected XSS via GET /api/icon/getDynamicIcon with type=8, where attacker-controlled content is inserted into SVG output without escaping. Prior to 3.5.9, this allowed injection of executable JavaScript in the SiYuan web origin, potentially enabling act...

CVE-2026-23847

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons type=8. The content query parameter is inserted directly into the S...

CVE-2026-23847: Improper Neutralization of Input During Web Page Generation

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons type=8. The content query parameter is inserted directly into the S...