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CVE-2026-116169— SiYuan 2.10.0 before 3.8.7 Stored XSS via KaTeX \href in Math Blocks

Quick assessment

Affected

siyuan-note siyuan

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SiYuan 在 2.10.0 至 3.8.7（不含）的版本中存在一个存储型跨站脚本（XSS）漏洞。当启用 KaTeX 信任渲染时，拥有编辑权限的用户可以通过在数学块内容中插入协议的 URL 来注入脚本。攻击者可存储包含、或的恶意载荷，这些载荷会被通过赋值，导致读者点击渲染后的链接时，恶意脚本在应用域名下执行。

CVSS 5.4 · Medium Updated Oct 25, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

Vendor	Product	Version Range	Status
siyuan-note	siyuan	`2.10.0< 3.8.7`	affected
		`3.8.7`	unaffected

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
siyuan-note	siyuan	2.10.0 ~ 3.8.7	-

II. Public POCs for CVE-2026-116169

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-116169

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Vendor Advisories for CVE-2026-116169 (2)

https://www.cve.org/CVERecord?id=CVE-2026-116169

Same Patch Batch · siyuan-note · 2026-10-25 · 6 CVEs total

CVE-2026-116171	7.5 HIGH	SiYuan 3.5.4 before 3.8.7 Sensitive Path Bypass via Windows Extended-Length Prefix
CVE-2026-116167	6.8 MEDIUM	SiYuan 2.9.0 before 3.8.7 XSS via check-auth to Parameter
CVE-2026-116166	6.8 MEDIUM	SiYuan 3.6.0 before 3.8.7 Cleartext Transmission via Unenforced networkServeTLS Setting
CVE-2026-116168	6.2 MEDIUM	SiYuan before v3.8.7 Path Traversal Local File Read via MCP Asset Tool
CVE-2026-116170	4.9 MEDIUM	SiYuan before v3.8.7 SQL Injection via History Search op and query

IV. Related Vulnerabilities

Same product: siyuan

Same vendor: siyuan-note

Same weakness: CWE-79