Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-66829

Gravedad CVSS v4.0:
BAJA
Tipo:
CWE-601 Redireccionamiento de URL a sitio no confiable (Open Redirect)
Fecha de publicación:
06/08/2026
Última modificación:
11/08/2026

Descripción

*** Pendiente de traducción *** URL Redirection to Untrusted Site (&amp;#39;Open Redirect&amp;#39;) vulnerability in the HTML5 scrubber in rrrene html_sanitize_ex allows a remote attacker to force visitors of a page to navigate to a site of the attacker&amp;#39;s choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps attacker-supplied elements in its output. A meta element acts on the whole document rather than on the fragment it was embedded in, so it can also declare document-wide directives such as Content-Security-Policy.<br /> <br /> This is not cross-site scripting. Browsers do not navigate a meta refresh to a javascript: URL, so the uppercase JAVASCRIPT: filter bypass yields no script execution and none was demonstrated.<br /> <br /> This issue affects html_sanitize_ex: from 0.3.1 before 1.5.3.

Productos y versiones vulnerables

CPE Desde Hasta
cpe:2.3:a:rrrene:htmlsanitizeex:*:*:*:*:*:*:*:* 0.3.1 (incluyendo) 1.5.3 (excluyendo)