CVE-2026-100643

HIGHCVSS 8.0

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.

Timeline

Published:September 26th, 2026 2:16 PM

Last modified:September 28th, 2026 7:16 PM

CVSS Scoring

CVSS v3: 8.0 (HIGH)

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

Weaknesses (CWE)

CWE-79

References & Reports

Advisories, patches, and third-party reports

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-h3p6-c22r-fx2j
https://www.vulncheck.com/advisories/siyuan-before-3.8.4-stored-xss-via-attribute-view-textarea
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-h3p6-c22r-fx2j

Source: NIST NVD · Data may lag official sources by up to one minute