Critical severity · published Aug 15, 2026
CVE-2026-73044
SiYuan before v3.7.4 Stored Cross-Site Scripting via Column Width
9.0
CVSS
0.4%
EPSS
No
On KEV
Description
SiYuan versions before v3.7.4 fail to validate or escape table column width values, allowing stored cross-site scripting injection into style attributes. Attackers can inject malicious payloads through the setAttrViewColWidth API that break out of style attributes and inject event handlers on every table cell, executing arbitrary code in the Electron renderer with Node integration enabled.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
siyuan · siyuan-note
before 3.7.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73044
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73044
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rj55-w3xr-gj62
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-before-stored-cross-site-scripting-via-column-width
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