Several vulnerabilities have been discovered in the OpenJDK Java runtime, resulting in denial of service, bypass of sandbox restrictions or information disclosure.
For Debian 9 stretch, these problems have been fixed in version 8u272-b10-0+deb9u1.
We recommend that you upgrade your openjdk-8 packages.
For the detailed security status of openjdk-8 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/openjdk-8
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