CVE-2026-34401 XML Notepad: XML External Entity (XXE) Injection via Unsafe XmlTextReader in XML Diff and Schema Loading

XML Notepad is a Windows program that provides a simple intuitive User Interface for browsing and editing XML documents. Prior to version 2.9.0.21, XML Notepad does not disable DTD processing by default which means external entities are resolved automatically. There is a well known attack related...

CVE-2026-34401 XML Notepad: XML External Entity (XXE) Injection via Unsafe XmlTextReader in XML Diff and Schema Loading

XML Notepad is a Windows program that provides a simple intuitive User Interface for browsing and editing XML documents. Prior to version 2.9.0.21, XML Notepad does not disable DTD processing by default which means external entities are resolved automatically. There is a well known attack related...

Use After Free

libxml2 is vulnerable to Use After Free. The vulnerability is caused due to a lack of validation within the xmlTextReader module. When parsing a crafted XML document using the XML Reader interface with DTD validation and XInclude expansion enabled, a xmlValidatePopElement use-after-free exception...