symfony/ux-live-component Format-less date LiveProps parsed with the permissive DateTime constructor

Description When a LiveProp is typed as a DateTimeInterface and no explicit format is configured, Symfony\UX\LiveComponent\LiveComponentHydrator::hydrateObjectValue falls back to new $className$value. The DateTime / DateTimeImmutable constructors accept relative strings such as "now", "tomorrow",...

symfony/ux-live-component XSS via attacker-controlled child component tag

Description Symfony\UX\LiveComponent\Util\ChildComponentPartialRenderer::createHtml interpolates the $childTag argument directly into the HTML output as a tag name, without escaping or validation. The value originates from client-controlled JSON childrenid.tag parsed by LiveComponentSubscriber an...