CVE-2011-4838

CVE-2011-4838 describes a denial-of-service vulnerability in JRuby versions prior to 1.6.5.1, where crafted input can trigger predictable hash collisions, leading to excessive CPU consumption in applications utilizing hash tables. This vulnerability has a CVSS score of 5.0, indicating a medium severity, and can be exploited remotely with low attack complexity, resulting in a partial denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.