EEF-CVE-2026-66829 html_sanitize_ex HTML5 scrubber keeps attacker-supplied meta refresh, allowing forced cross-origin redirection

Summary URL Redirection to Untrusted Site 'Open Redirect' 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's choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps...

CVE-2026-66829

The CVE affects html_sanitize_ex (HtmlSanitizeEx.html5/1) where attacker-supplied meta refresh elements survive sanitization. The root cause is that a meta element can apply document-wide directives, enabling open redirects to user-chosen sites via a tag. Affected versions: html_sanitize_ex from...

EUVD-2026-54082

URL Redirection to Untrusted Site 'Open Redirect' vulnerability in the HTML5 scrubber in rrrene htmlsanitizeex allows a remote attacker to force visitors of a page to navigate to a site of the attacker's choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps attacker-supplied...

CVE-2026-66843

CVE-2026-66843 affects html_sanitize_ex HTML5 scrubber. The vulnerability arises because the object element (data attribute) is not registered in allow_tag_with_uri_attributes/3, and the only guard is a lowercase javascript: prefix. This allows attacker-supplied content to be embedded in a truste...

CVE-2026-66843

Inclusion of Functionality from Untrusted Control Sphere vulnerability in the HTML5 scrubber in rrrene htmlsanitizeex 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...

EUVD-2026-54080

Inclusion of Functionality from Untrusted Control Sphere vulnerability in the HTML5 scrubber in rrrene htmlsanitizeex 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...

EEF-CVE-2026-66843 html_sanitize_ex HTML5 scrubber keeps attacker-supplied `<object>` elements, allowing untrusted content embedding

Summary 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...