Medium severity · published Oct 25, 2026
CVE-2026-116169
SiYuan 2.10.0 before 3.8.7 Stored XSS via KaTeX \href in Math Blocks
New
5.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
siyuan · siyuan-note
2.10.0 before 3.8.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116169
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116169
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhvq-jqv9-pgjq
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-2.10.0-before-3.8.7-stored-xss-via-katex-href-in-math-blocks
More from siyuan
10.0
CVE-2026-72811
SiYuan before v3.7.4 SQL Injection via backlink search
10.0
CVE-2026-69085
SiYuan before v3.7.3 SQL Injection via searchDocs
10.0
CVE-2026-69084
SiYuan before v3.7.3 SQL Injection via searchEmbedBlock
10.0
CVE-2026-69083
SiYuan before v3.7.3 SQL Injection via fullTextSearchAssetContent
10.0
CVE-2026-66012
SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP