This is not a KNIME issue per se; Apache libraries which are a dependency of something, on which KNIME depends, have a bug that was fixed in a newer version ( see https://issues.apache.org/jira/browse/CXF-7142 ). At some point KNIME will be able to migrate to a newer version of the dependency which will hopefully move the CXF dependency (currently on 3.0.7) to a fixed version.