org.cyberneko.html is an html parser written in Java. The fork of "org.cyberneko.html" used by Nokogiri (Rubygem) raises a "java.lang.OutOfMemoryError" exception when parsing ill-formed HTML markup. Users are advised to upgrade to ">= 1.9.22.noko2". Note: The upstream library "org.cyberneko.html" is no longer maintained. Nokogiri uses its own fork of this library located at https://github.com/sparklemotion/nekohtml and this CVE applies only to that fork. Other forks of nekohtml may have a similar vulnerability.