CVE-2026-100645 SiYuan - Stored XSS

SiYuan 3.7.0 before 3.8.4 contains a stored XSS caused by unescaped field descriptions in aria-label attributes in gallery and kanban database renderers, letting attackers execute arbitrary commands with user privileges in Electron app with nodeIntegration enabled.

CVSS base score 8.0 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Published
26 September 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 3.8.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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