Low [CVE-2026-57434] Denial of Service via NULL pointer dereference
This low-severity Red Hat Linux advisory covers CVE-2026-57434 affecting Red Hat 3scale API Management Platform 2, Red Hat Satellite 6.
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Summary
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.
An attacker who can control the construction of Nokogiri node objects could exploit this to cause a Denial of Service. Red Hat severity: Low — CVSS 2.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
Weakness: CWE-476. Affected Red Hat products: Red Hat 3scale API Management Platform 2; Red Hat Satellite 6.
Red Hat does not currently list a fixing RHSA for this CVE.
- < 1.19.4
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
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