CVE-2022-24839: Uncontrolled Resource Consumption in org.cyberneko.html (nokogiri fork)

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-11 · updated 2026-06-17
Weakness: CWE-400

Description

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 Note: The upstream library `org.cyberneko.html` is no longer maintained.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: 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0

How to fix

Upgrade to a fixed version: Nekohtml Project Nekohtml 1.9.22.noko2. Check the vendor advisory for mitigations.

References

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