The remote Fedora host is missing a security update.
Fix syntax highlight script to use correct version of highlight. Update to new upsteam version with 2 security fixes, enhancements and misc other bug fixes. See http://git.zx2c4.com/cgit/commit/?id=a6a932e198e8b6b564d7a4bb43e78078d 8296026 for details. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.