CVE-2012-5370: Jruby

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

JRuby computes hash values without properly restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table, as demonstrated by a universal multicollision attack against the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4838.

Affected products

• Jruby Jruby: affected versions not specified

Published 2012-11-28. Last modified 2026-06-16.