CVE-2026-7263 DoS attack via DOMNode::C14N()

In PHP versions 8.4. before 8.4.21 and 8.5. before 8.5.6, DOMNode::C14N method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial ...