Home / Vulnerability Intelligence / CVE-2026-39846

CVE-2026-39846 - Vulnerability Analysis

CriticalCVSS: 9.0

Last Updated: April 7, 2026

SiYuan - Stored XSS & Remote Code Execution

Published: April 7, 2026Updated: April 7, 2026Remote Exploitable

Overview

SiYuan < 3.6.4 contains a stored XSS caused by unsafe escaping of table caption content in the Electron desktop client, letting remote attackers execute arbitrary code with Node.js API access, exploit requires victim to open a crafted synced note.

Severity & Score

Severity: Critical

CVSS Score: 9.0

Impact

Attackers can execute arbitrary code with Node.js API access on victim's desktop, leading to full system compromise.

Mitigation

Update to version 3.6.4 or later.

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phhp-9rm9-6gr2

Related Resources

Vulnerability Intelligence Dashboard
Credential Scanner

Details

CVE ID: CVE-2026-39846
Severity: Critical
CVSS Score: 9.0
Type: stored_xss
Status: new

CWE

CWE-79

CVSS Metrics

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