Critical severity · published Aug 15, 2026
CVE-2026-73042
SiYuan before v3.7.4 Remote Code Execution via Menu Metadata
9.0
CVSS
0.5%
EPSS
No
On KEV
Description
SiYuan before v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary code via event handlers, reaching Node built-ins due to Electron's insecure configuration.
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)0.5% · higher than 44% 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-2026-73042
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73042
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-gcm3-qcq3-72rv
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-menu-metadata
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