GHSA-72XP-P242-47P9 Symfony has a UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection

Description Symfony routes can declare a requirements regex per path parameter, e.g. a route /locale/blog with requirements: locale: 'en|fr|de' . The Twig path / url helpers backed by UrlGenerator validate supplied parameter values against that regex before building the URL. UrlGenerator construc...

Symfony has a UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection

Description Symfony routes can declare a requirements regex per path parameter, e.g. a route /locale/blog with requirements: locale: 'en|fr|de' . The Twig path / url helpers backed by UrlGenerator validate supplied parameter values against that regex before building the URL. UrlGenerator construc...

PT-2026-44134

Description Symfony routes can declare a requirements regex per path parameter, e.g. a route / locale/blog with requirements: locale: 'en|fr|de' . The Twig path / url helpers backed by UrlGenerator validate supplied parameter values against that regex before building the URL. UrlGenerator...

Incorrect Regular Expression

Overview symfony/symfony is a PHP framework for web applications and a set of reusable PHP components. Affected versions of this package are vulnerable to Incorrect Regular Expression in the route URL requirements when a requirement is set as an alternation such as locale: 'ar|bg|...|vi|...|zhCN'...

CVE-2026-45065: UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection

More info at https://symfony.com/cve-2026-45065...