CVE-2026-57438

Name	CVE-2026-57438
Description	Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, XInclude substitution performed by Nokogiri::XML::Node#do_xinclude replaced each <xi:include> in place, freeing the include node along with its children (such as <xi:fallback> and its descendants) and any namespaces declared on them. If an application had already exposed one of those nodes or namespaces to Ruby, the corresponding Ruby object was left pointing at freed memory. Using the object could result in invalid reads or writes to memory. This vulnerability is fixed in 1.19.4.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1140769

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ruby-nokogiri (PTS)	bullseye	1.11.1+dfsg-2	vulnerable
	bullseye (security)	1.11.1+dfsg-2+deb11u1	vulnerable
	bookworm	1.13.10+dfsg-2	vulnerable
	trixie	1.18.2+dfsg-1	vulnerable
	forky	1.19.1+dfsg-1	vulnerable
	sid	1.19.3+dfsg-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ruby-nokogiri	source	(unstable)	(unfixed)			1140769

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wfpw-mmfh-qq69