Copyright © 2012 Red Hat, Inc. All rights reserved. Low 2026-06-25T14:32:10 nokogiri: rubygem-nokogiri: Nokogiri: Denial of Service via NULL pointer dereference 2.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CWE-476

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.

A flaw was found in Nokogiri, an open source XML and HTML library for the Ruby programming language. A remote attacker could exploit this vulnerability by calling specific methods on allocated-but-uninitialized native wrapper classes that inherit from `Nokogiri::XML::Node`. This could lead to a NULL pointer dereference, causing the process to crash and resulting in a Denial of Service (DoS).

A flaw was found in Nokogiri, an open source XML and HTML library for Ruby. Calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node triggers a NULL pointer dereference, crashing the process. An attacker who can control the construction of Nokogiri node objects could exploit this to cause a Denial of Service. The vulnerability is fixed in Nokogiri 1.19.4. There is no mitigation for this flaw other than updating to Nokogiri version 1.19.4 or later. As a workaround, ensure that untrusted input cannot trigger the construction of uninitialized native wrapper classes inheriting from Nokogiri::XML::Node. Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp21/backend Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp21/system Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp21/zync Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp22/backend Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp22/system Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp22/zync Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp26/toolbox Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/backend-rhel8 Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/system-rhel7 Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/system-rhel8 Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/system-rhel9 Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/toolbox-rhel8 Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/toolbox-rhel9 Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/zync-rhel8 Red Hat 3scale API Management Platform 2 Fix deferred 3scale-amp2/zync-rhel9 Red Hat Satellite 6 Fix deferred rubygem-nokogiri Red Hat Satellite 6 Fix deferred satellite:el8/rubygem-nokogiri https://www.cve.org/CVERecord?id=CVE-2026-57434 https://nvd.nist.gov/vuln/detail/CVE-2026-57434 https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-9cv2-cfxc-v4v2