CVE-2026-73491

A flaw was found in Loofah. The Loofah::HTML5::Scrub.alloweduri? function fails to properly detect javascript: Uniform Resource Identifiers URIs when their scheme is split or prefixed with HTML5 named whitespace character references, such as or . This vulnerability allows a remote attacker to cra...

CVE-2026-73491

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.alloweduri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character...

UBUNTU-CVE-2026-73491

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.alloweduri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character...

CVE-2026-73491

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.alloweduri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character...

CVE-2026-73491

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.alloweduri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character...

CVE-2026-73491 Loofah `allowed_uri?` does not detect `javascript:` URIs split by named whitespace character references

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.alloweduri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character...

EUVD-2026-57628

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.alloweduri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character...

CVE-2026-73491

Loofah 2.25.0–2.25.2 contains a vulnerability in Loofah::HTML5::Scrub.allowed_uri? where javascript: URIs are not rejected if the scheme is split or prefixed by HTML5 named whitespace references ( , ). CGI.unescapeHTML leaves these references intact, causing allowed_uri? to report a URL as safe e...

CVE-2026-73491

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.alloweduri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character...