Bug 2492951 (CVE-2026-57435) - CVE-2026-57435 nokogiri: rubygem-nokogiri: Nokogiri: Denial of Service due to use-after-free when replacing XML attribute values
Summary: CVE-2026-57435 nokogiri: rubygem-nokogiri: Nokogiri: Denial of Service due to...
Keywords:
Status: NEW
Alias: CVE-2026-57435
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-25 15:02 UTC by OSIDB Bzimport
Modified: 2026-06-29 08:38 UTC (History)
25 users (show)

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Description OSIDB Bzimport 2026-06-25 15:02:55 UTC 
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri’s CRuby native extension could leave a Ruby wrapper pointing to freed memory when replacing the value of an XML attribute. If Ruby code had already accessed an attribute child node, Nokogiri::XML::Attr#value= could free the underlying native child node while the wrapper remained reachable through the document node cache. A later use of the freed child node or a Ruby GC mark could dereference an invalid pointer, causing an invalid read and a possible segfault. This vulnerability is fixed in 1.19.4.
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