The payload length in a WebSocket frame was not correctly validated. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.
For Debian 8 jessie, these problems have been fixed in version 8.0.14-1+deb8u19.
We recommend that you upgrade your tomcat8 packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/