CVE-2026-23847 | THREATINT

Description

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 SVG <text> tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript. Version 3.5.4 patches the issue.]

PUBLISHED Reserved 2026-01-16 | Published 2026-01-19 | Updated 2026-01-20 | Assigner GitHub_M

LOW: 2.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 3.5.4

affected

References

github.com/...siyuan/security/advisories/GHSA-w836-5gpm-7r93

github.com/siyuan-note/siyuan/issues/16844

github.com/...ommit/5c0cc375b47567e15edd2119066b09bb0aa18777

cve.org (CVE-2026-23847)

nvd.nist.gov (CVE-2026-23847)

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