XSS in Siyuan-Note Siyuan
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 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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-hhvq-jqv9-pgjq (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-2.10.0-before-3.8.7-stored-xss-via-katex-hr… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116169?
- CVE-2026-116169 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-25.
- How severe is CVE-2026-116169?
- Medium severity. CVSS v3 base score is 5.4 out of 10.