Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes
CVE-2026-57434 is fixed in ruby-nokogiri on 1 platform by DEBIAN-CVE-2026-57434 (version 1.19.4+dfsg-1), released July 3, 2026. It is not reported as exploited. Patch Radar priority: High.
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. This caused a NULL pointer dereference that could crash the process. This vulnerability is fixed in 1.19.4.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ruby-nokogiri · Debian 14 | 1.19.4+dfsg-1 | DEBIAN-CVE-2026-57434 | Jul 3, 2026 |
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