Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-57436

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 23.0%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-57436


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