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

CVE-2026-57436

Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
sparklemotion / nokogiri	affected < 1.19.4

CWE

CWE-416

References

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wjv4-x9w8-wm3h

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.