CVE-2026-57434: Nokogiri

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. This caused a NULL pointer dereference that could crash the process. This vulnerability is fixed in 1.19.4.

Affected products

• Nokogiri Nokogiri: before 1.19.4 (fixed in 1.19.4)

Published 2026-06-25. Last modified 2026-06-26.