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Vulnerability record · CVE-2026-73053 · published 15 August 2026

CVE-2026-73053: Cross-site scripting vulnerability

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.

9.4 CVSS 4.0 Critical EPSS 0.52% · top 58.2% CWE-79 · Cross-site scripting Deferred
9.4CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
26 Aug 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-73053), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.