Vulnerability · Published Aug 15, 2026 · Assigned by VulnCheck

CVE-2026-73043SiYuan before v3.7.4 Remote Code Execution via Template Calculation

Critical 9.0

In plain English

A critical-severity cross-site scripting in siyuan from siyuan-note. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)9.0Critical

Exploit odds (30 days)0.6%top 49.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – before 3.7.4

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-rwh7-gm74-67h6) vendor-advisory
VulnCheck Advisory: SiYuan before v3.7.4 Remote Code Execution via Template Calculation third-party-advisory