Critical severity · published Aug 15, 2026
CVE-2026-73043
SiYuan before v3.7.4 Remote Code Execution via Template Calculation
9.0
CVSS
0.6%
EPSS
No
On KEV
Description
SiYuan versions before v3.7.4 contain a remote code execution vulnerability in the Template calculation operator, which renders user-authored Go templates and stores output verbatim without sanitization. Attackers can inject malicious HTML and JavaScript into template calculations that execute in the desktop client renderer with Node integration enabled, allowing arbitrary code execution when the database is opened.
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)0.6% · higher than 51% 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-2026-73043
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73043
github.com
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rwh7-gm74-67h6
www.vulncheck.com
https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-template-calculation
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