---
id: CVE-2026-116169
title: SiYuan 2.10.0 before 3.8.7 Stored XSS via KaTeX \href in Math Blocks
summary: >-
  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 c…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: siyuan-note
product: siyuan
affected:
  - siyuan >= 2.10.0 < 3.8.7
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T14:27:41.907Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116169'
references:
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhvq-jqv9-pgjq
    label: GitHub Security Advisory (GHSA-hhvq-jqv9-pgjq)
  - url: >-
      https://www.vulncheck.com/advisories/siyuan-2.10.0-before-3.8.7-stored-xss-via-katex-href-in-math-blocks
    label: >-
      VulnCheck Advisory: SiYuan 2.10.0 before 3.8.7 Stored XSS via KaTeX \href
      in Math Blocks
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.936Z'
---

## Overview

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.

## Affected

- `siyuan >= 2.10.0 < 3.8.7`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.