PT-2026-3492 · Siyuan · Siyuan

Jaroslaw-Wawiorko · CVE-2026-23847 · Published 2026-01-19 · Updated 2026-07-30

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions SiYuan versions prior to 3.5.4

Description SiYuan is a personal knowledge management system susceptible to reflected cross-site scripting. The issue occurs in the /api/icon/getDynamicIcon API endpoint. The endpoint generates SVG images for text icons (type=8), and the content parameter is directly inserted into the SVG <text> tag without proper XML escaping. Because the response Content-Type is set to image/svg+xml, injecting unescaped tags can disrupt the XML structure and allow for JavaScript execution.

Recommendations Update to version 3.5.4 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-23847

GHSA-W836-5GPM-7R93

GO-2026-4343

OPENSUSE-SU-2026:21483-1

SUSE-SU-2026:0403-1

Affected Products

Siyuan

References · 1749

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23847.json · Exploit
• https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777 · Patch
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93 · Patch
• https://github.com/siyuan-note/siyuan/issues/16844 · Patch
• https://osv.dev/vulnerability/GHSA-w836-5gpm-7r93 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0403-1 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-4343 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23847 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23847 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:21483-1 · Vendor Advisory
• https://github.com/siyuan-note/siyuan · Note
• https://suse.com/security/cve/CVE-2025-65797 · Note
• https://suse.com/security/cve/CVE-2026-44427 · Note
• https://suse.com/security/cve/CVE-2026-27589 · Note
• https://suse.com/security/cve/CVE-2026-7736 · Note