CVE Watch12 de nov. de 2026

CVE-2026-126209

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until

CVSS

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Sem CVSS

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 12 de nov. de 2026 · Última mod.: 12 de nov. de 2026 · CWE-79 · CWE-184

EPSS · 30d

Ainda não há histórico EPSS suficiente.

Descrição técnica

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.3, Loofah::HTML5::Scrub.allowed_uri? strips whitespace and control characters before decoding a semicolon-less numeric character reference, changing where the reference ends and hiding a javascript: or vbscript: scheme that a browser reconstructs. The bypass applies to encoded colons and encoded scheme letters when a stripped character terminates the numeric reference. An application that renders the approved value in href or another browser-interpreted URI attribute can allow cross-site scripting, and Rails::HTML::Sanitizer.allowed_uri? re-exports the affected helper. Loofah's default sanitize() path is not affected because Nokogiri decodes entities before URI evaluation. This issue is fixed in version 2.25.3.

Referências oficiais

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