CVE-2026-73490: Flavorjones Loofah

Medium severity, CVSS 4.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.

Affected products

• Flavorjones Loofah: before 2.25.2 (fixed in 2.25.2)

Published 2026-08-12. Last modified 2026-09-09.