Security researchers from Snyk discovered that the fix for CVE-2019-9658 was incomplete. Checkstyle, a development tool to help programmers write Java code that adheres to a coding standard, was still vulnerable to XML External Entity (XXE) injection.

For Debian 8 Jessie, this problem has been fixed in version 5.9-1+deb8u2.

We recommend that you upgrade your checkstyle packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS