CVE-2026-45066

CVE-2026-45066 affects Symfony’s HtmlSanitizer: URL sanitization bypass due to UrlSanitizer::parse() following RFC 3986 while browsers use WHATWG, and because is checked against the media policy instead of the link policy. Affected versions: 6.1.0-BETA1–6.4.40, 7.4.12, and 8.0.12. Impact: off-al...

CVE-2026-45066 Symfony: HtmlSanitizer allowLinkHosts() / allowMediaHosts() Bypass via URL-Parser Differentials and <area> Misclassification

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0-BETA1 until 6.4.40, 7.4.12, and 8.0.12, HtmlSanitizer URL sanitization can allow off-allowlist URLs through allowLinkHosts or allowMediaHosts because UrlSanitizer::parse follows RFC 3986...

CVE-2026-45066: HtmlSanitizer allowLinkHosts() / allowMediaHosts() Bypass via URL-Parser Differentials and <area> Misclassification

More info at https://symfony.com/cve-2026-45066...

CVE-2026-45066: HtmlSanitizer allowLinkHosts() / allowMediaHosts() Bypass via URL-Parser Differentials and <area> Misclassification

More info at https://symfony.com/cve-2026-45066...