High severity · published Sep 26, 2026
CVE-2026-100645
SiYuan 3.7.0 before 3.8.4 Stored XSS via Gallery Kanban
8.0
CVSS
0.4%
EPSS
No
On KEV
Description
SiYuan versions 3.7.0 before 3.8.4 contain a stored cross-site scripting vulnerability in gallery and kanban database renderers where field descriptions are not escaped in aria-label attributes. In the Electron desktop app with nodeIntegration enabled, attackers can inject JavaScript that calls Node.js child_process APIs to execute arbitrary commands with user privileges.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
siyuan · siyuan-note
3.7.0 before 3.8.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100645
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100645
vendor-advisory
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-556j-q8c8-qqg3
third-party-advisory
https://www.vulncheck.com/advisories/siyuan-3.7.0-before-3.8.4-stored-xss-via-gallery-kanban
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