Invalid characters inside CDATA section

[marcinar]

Example:

var factory = XMLOutputFactory.newInstance();
factory.setProperty(WstxOutputProperties.P_OUTPUT_INVALID_CHAR_HANDLER, new ReplacingHandler('�'));

try (var output = Files.newOutputStream(Paths.get("/tmp/test.xml"))) {
    XMLStreamWriter writer = factory.createXMLStreamWriter(output);

    writer.writeStartDocument();
    writer.writeStartElement("Test");
    writer.writeCData("Text content\u001A...");
    writer.writeEndElement();
    writer.writeEndDocument();

    writer.close();
}

In this case, the writer doesn't replace (or even check for) any invalid characters. The output contains the 0x1A codepoint inside the CDATA section, which isn't valid XML.