enshrined/svg-sanitize: Stored XSS via DTD Entity / HTML5 Named Character Reference Collision

Summary A crafted SVG bypasses enshrined/svg-sanitize's href validation and delivers a javascript: URL through the sanitizer unchanged. The bypass exploits a semantic mismatch between XML entity resolution used during sanitization and HTML5 Named Character Reference resolution used by the browser...

CVE-2026-107380 enshrined/svg-sanitize: Stored XSS via DTD Entity / HTML5 Named Character Reference Collision

savg-sanitizer is a PHP SVG/XML sanitizer. Prior to 1.0.0, svg-sanitizer's isHrefSafeValue validates an SVG href after XML DTD entity expansion, but saveXML serializes the original entity reference after removing the DTD declaration. A crafted entity such as Tab can appear to the sanitizer as a...

CVE-2026-107380

The savg-sanitizer PHP SVG/XML sanitizer is vulnerable to Stored XSS in versions prior to 1.0.0 . The issue stems from a discrepancy between isHrefSafeValue(), which validates href attributes after XML DTD entity expansion, and saveXML(), which serializes the original entity reference after remov...