rootpwn

critical · CVSS v3 8 · CVSS v4 8.5

CVE-2026-100643

SiYuan versions before v3.8.4 fail to properly escape four stored Attribute View values in textarea elements, allowing a…

Description

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.

Scores

Severity
critical
CVSS v2
9
CVSS v3
8
CVSS v4
8.5
EPSS
—

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