CVE-2026-57436
Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-416 |
| Vendor | sparklemotion |
| Product | nokogiri |
| Published | Jun 25, 2026 |
| Last Updated | Jun 25, 2026 |
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Affected Versions
sparklemotion / nokogiri
< 1.19.4