CVE-2022-24839: Nekohtml Project Nekohtml

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

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 Note: The upstream library `org.cyberneko.html` is no longer maintained.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.

Affected products

• Nekohtml Project Nekohtml: before 1.9.22.noko2 (fixed in 1.9.22.noko2)
• Oracle WebLogic Server: version 12.2.1.3.0 only; version 12.2.1.4.0 only; version 14.1.1.0.0 only

Published 2022-04-11. Last modified 2026-06-17.