Bug 2492935 (CVE-2026-57434)

Summary: CVE-2026-57434 nokogiri: rubygem-nokogiri: Nokogiri: Denial of Service via NULL pointer dereference
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: akostadi, amasferr, anthomas, crizzo, dmayorov, ehelms, eshamard, ggainey, jlledo, jpasqual, juwatts, jvasik, kaycoth, mhulan, nmoumoul, osousa, pantinor, pcreech, rblanco, rchan, rhel-process-autobot, smallamp, tmalecek, tsedmik, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2497306, 2497305    
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Description OSIDB Bzimport 2026-06-25 15:01:54 UTC
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.