CVE-2026-45071 Symfony: XXE (Local File Disclosure) in DomCrawler::addXmlContent() via validateOnParse = true

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Crawler::addXmlContent set DOMDocument::$validateOnParse = true before loadXML, re-enabling external entity resolution and allowing attacker-supplied XML ...