CVE-2026-73053

CRITICAL

CVE: CVE-2026-73053 - SiYuan versions before v3Sign in to save

CVSS

9.0

CVSS v3.1

EPSS

N/A

Exploit Prediction Score

Published

August 15, 2026

Exploitability

No EPSS data available

Description

SiYuan versions before v3.7.4 contain a cross-site scripting vulnerability in the unicode2Emoji function that fails to sanitize codepoint branch output. Attackers can craft document icons with hex-encoded markup that executes in the renderer with Node integration enabled, achieving arbitrary code execution on the host system.

Weaknesses

CWE-79

Affected Packages

No package data available.

Aliases

CVE-2026-73053

Related references

Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vx5w-qrvp-mmcq
https://www.vulncheck.com/advisories/siyuan-before-cross-site-scripting-via-unicode2emoji