CVE-2026-57436 – Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type

CVE ID :CVE-2026-57436

Published : June 25, 2026, 2:33 p.m. | 1 hour, 11 minutes ago

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.

Severity: 0.0 | NA

Visit the link for more details, such as CVSS details, affected products, timeline, and more…