MajorCritical vulnerability
CVE-2026-100643 (CVSS 8.5)
NVD · officialPublished Sep 26, 2026Risk 37/100
SiYuan versions before v3.8.4 fail to properly escape four stored Attribute View values in textarea elements, allowing authenticated attackers to inject JavaScript by modifying field descriptions, template sources, select option descriptions, or footer calculation templates. Attackers can execute stored JavaScript when other users open affected database menus, and in the Electron desktop app with nodeIntegration enabled, this leads to command execution with SiYuan process privileges.
Technical details
CVSS
8.5
AV:NetworkAC:LowPR:LowUI:Active
Evidence and sources
This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.
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