CVE-2026-116169GHSA-hhvq-jqv9-pgjq

SiYuan 2.10.0 before 3.8.7 Stored XSS via KaTeX \href in Math Blocks

siyuan-note siyuan

Open in Threatline Record JSON

CVSS

5.1Medium

ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV

Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet

Fixed in3.8.7Fixed versionCVE List

Published25 Oct 2026Updated 25 Oct 2026CVE List

What fixes it

3.8.7siyuanCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

🚨 CVE-2026-116169 SiYuan from 2.10.0 before 3.8.7 contains a stored cross-site scripting vulnerability that allows users with edit permission to inject script by placing javascript: URLs in math blockTelegram: CVE Notify, 25 Oct 2026

Description

SiYuan from 2.10.0 before 3.8.7 contains a stored cross-site scripting vulnerability that allows users with edit permission to inject script by placing javascript: URLs in math block content rendered with KaTeX trust enabled. Attackers can store \href, \url, or \includegraphics payloads that mathRender assigns via innerHTML, executing script in the application origin when a reader clicks the rendered link.

Text from CVE List

Affected versions 2

siyuanaffected: 2.10.0 before 3.8.7CVE List
siyuanunaffected: 3.8.7CVE List