CVE-2026-66843
Gravedad CVSS v4.0:
BAJA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
06/08/2026
Última modificación:
11/08/2026
Descripción
*** Pendiente de traducción *** Inclusion of Functionality from Untrusted Control Sphere vulnerability in the HTML5 scrubber in rrrene html_sanitize_ex allows a remote attacker to load a document of their choosing into a trusted page via the data attribute of an element in sanitized HTML. object is the one URI-bearing element in lib/html_sanitize_ex/scrubber/html5.ex never registered through allow_tag_with_uri_attributes/3, and its only guard is a prefix match on lowercase "javascript:", so mixed-case variants, data: URIs, protocol-relative URLs and same-origin paths all survive.<br />
<br />
This is not unconditional cross-site scripting. A javascript: URL does not execute through in current browsers, data: documents load in an opaque origin, and host-origin script execution additionally requires the application to serve attacker-controlled content from a same-origin path.<br />
<br />
This issue affects html_sanitize_ex: from 0.3.1 before 1.5.3.
Impacto
Puntuación base 4.0
2.30
Gravedad 4.0
BAJA
Puntuación base 3.x
6.10
Gravedad 3.x
MEDIA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:rrrene:htmlsanitizeex:*:*:*:*:*:*:*:* | 0.3.1 (incluyendo) | 1.5.3 (excluyendo) |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página



