Medium severity5.3NVD Advisory· Published Jun 25, 2026· Updated Jun 26, 2026
CVE-2026-57436
CVE-2026-57436
Description
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Document#root= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage collection or finalization, leading to an invalid memory read or potentially a segfault. This vulnerability is fixed in 1.19.4.
Affected products
2- Range: <1.19.4
Patches
Vulnerability mechanics
References
1- github.com/sparklemotion/nokogiri/security/advisories/GHSA-wjv4-x9w8-wm3hnvdMitigationVendor Advisory
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