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CVE-2026-93922— SiYuan through 3.8.4 Stored XSS via notebook names

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 3.8.4 及以下版本在“每日笔记”选择器对话框中，未对笔记本名称进行转义，而是直接将其作为原始 HTML 渲染。这导致在 Electron 渲染进程中存在存储型跨站脚本（XSS）漏洞。攻击者可以创建名称中包含 HTML 载荷的笔记本；当选择器打开时，这些载荷会以拥有 Node.js 访问权限的 JavaScript 形式执行，从而有可能实现操作系统命令执行。

CVSS 8.8 · High Updated Sep 19, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1059.007 · JavaScript

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Vulnerability Information

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Vulnerability Title

SiYuan through 3.8.4 Stored XSS via notebook names

Source: CVE Program / CVE List V5

Vulnerability Description

SiYuan through 3.8.4 renders notebook names as raw HTML in the Daily Note picker dialog without escaping, allowing stored cross-site scripting in the Electron renderer. Attackers can create notebooks with HTML payloads in names that execute JavaScript with Node.js access when the picker opens, enabling operating system command execution.

Source: CVE Program / CVE List V5

CVSS Information

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

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	0 ~ 3.8.4	-

II. Public POCs for CVE-2026-93922

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-93922

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Patches & Fixes for CVE-2026-93922 (1)

🔗 siyuan/app/src/util/mount.ts at v3.8.4 · siyuan-note/siyuan · GitHub Read full article technical-description

Vendor Advisories for CVE-2026-93922 (2)

Proof of Concept for CVE-2026-93922 (1)

🔗 GitHub - siyuan-note/siyuan: An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together 开源、隐私优先、自托管的知识工作空间，让人与智能体在此协作 · GitHub product

https://www.cve.org/CVERecord?id=CVE-2026-93922

Same Patch Batch · siyuan-note · 2026-09-18 · 4 CVEs total

CVE-2026-93923	8.8 HIGH	SiYuan through 3.8.4 Stored XSS via Heading Style Attribute
CVE-2026-93591	7.6 HIGH	SiYuan before 3.8.3 SQL Injection via unescaped tag in graph.go
CVE-2026-93921	4.3 MEDIUM	SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpoint

IV. Related Vulnerabilities

Same product: siyuan

Same vendor: siyuan-note

Same weakness: CWE-79

V. Comments for CVE-2026-93922

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-93922— SiYuan through 3.8.4 Stored XSS via notebook names

Quick assessment

Possible ATT&CK Techniques 2 AI

I. Basic Information for CVE-2026-93922

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-93922

III. Intelligence Information for CVE-2026-93922

Patches & Fixes for CVE-2026-93922 (1)

Vendor Advisories for CVE-2026-93922 (2)

Proof of Concept for CVE-2026-93922 (1)

Same Patch Batch · siyuan-note · 2026-09-18 · 4 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-93922

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