cvedb.io
CVE-2026-66394
HIGH · CVSS 8.7
EPSS exploitation probability: 0%
Published 2026-07-27T16:18:11.947 · Last modified 2026-07-27T18:17:00.980

Summary

SiYuan before v3.7.3 contains stored and reflected cross-site scripting vulnerabilities in SVG sanitization that allows authenticated attackers to execute scripts by bypassing the HTML parser-based cleaner. Attackers can hide script tags within desc, style, or noscript elements which the HTML parser treats as raw text but browsers interpret as executable SVG content when served as image/svg+xml, enabling script execution in the application origin.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.