Jetty 8.1.0.RC2 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
https://security.netapp.com/advisory/ntap-20190307-0004/
https://exchange.xforce.ibmcloud.com/vulnerabilities/72017
http://www.ubuntu.com/usn/USN-1429-1
http://www.securitytracker.com/id?1026475
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
http://www.ocert.org/advisories/ocert-2011-003.html
http://www.nruns.com/_downloads/advisory28122011.pdf
http://www.kb.cert.org/vuls/id/903934
http://secunia.com/advisories/48981
http://secunia.com/advisories/47408
http://marc.info/?l=bugtraq&m=143387688830075&w=2
http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html