CVE-2026-73043CWE-79cross-site-scripting

CVE-2026-73043

Critical · published August 16, 2026

CVSS v3.1

9.0

EPSS

Percentile

50.2

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 9.0 · CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0: 9.4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS: 0.00643 · 50.2th percentile
Weakness: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published: 2026-08-16T02:16Z

References (2)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rwh7-gm74-67h6 · [email protected]https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-template-calculation · [email protected]

EPSS history

Timeline

15 AUG 21:44Z
SiYuan before v3.7.4 Remote Code Execution via Template Calculation
cvelistv5