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9.3
CVE-2026-82653: SiYuan before 3.8.1 runs code from malicious package names
CVE-2026-82653 · published 4 days ago
Summary
Versions of SiYuan prior to 3.8.1 can be tricked into executing hidden scripts when a user removes a package or opens an encrypted notebook. An attacker could publish a package with a specially crafted name that runs code in the victim’s browser. Update SiYuan to version 3.8.1 or later to stop this behavior.
What to do
- Update siyuan-note siyuan to version 3.8.1 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| siyuan-note | siyuan | < 3.8.1 |
Original advisory text
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. A...
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.
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hvwp-43j9-4xgf vendor-advisory
- https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-confirmd... third-party-advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82653... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-82653 Vendor Advisory
Severity
9.3
Critical
CVSS 3.1: 8.9 (MITRE)
Exploitation
EPSS <1%
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published30 Aug 2026
Updated2 Sep 2026
First seen30 Aug 2026
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