CVE-2026-73053CWE-79cross-site-scripting

CVE-2026-73053

Critical · published August 16, 2026

CVSS v3.1
9.0
EPSS
1%
Percentile
43.3
In the wild
Unconfirmed
What it is

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.

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
0.00519 · 43.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-16T02:16Z
References (3)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vx5w-qrvp-mmcq · [email protected]https://www.vulncheck.com/advisories/siyuan-before-cross-site-scripting-via-unicode2emoji · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vx5w-qrvp-mmcq · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 AUG 21:44Z
    SiYuan before v3.7.4 Cross-Site Scripting via unicode2Emoji
    cvelistv5