CVE-2026-82653

HIGH 8.9

SiYuan before v3.8.1 Stored XSS via confirmDialog

CVSS Score

8.9

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan before v3.8.1 contains a stored cross-site scripting vulnerability in confirmDialog() where unescaped package names and notebook names are interpolated directly into innerHTML assignments. Attackers can submit malicious bazaar packages with HTML/script payloads in the name field that execute in users' browsers when uninstalling packages or unlocking encrypted notebooks.

CWE	CWE-79
Vendor	siyuan-note
Product	siyuan
Published	Aug 30, 2026

Stay Ahead of the Next One

Get instant alerts for siyuan-note siyuan

Be the first to know when new high vulnerabilities affecting siyuan-note siyuan are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

Low

Affected Versions

siyuan-note / siyuan

0 < 3.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hvwp-43j9-4xgf vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-confirmdialog

Credits

🔍 alham-rizvi 🔍 hey-raghav