CVE-2026-57235
High · 8.2CVSS
8.2
EPSS
0.4%
Published
Jun 25, 2026
CISA due date
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The record
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::NodeSet#[] (and its alias #slice) checked the requested index against the node set's bounds using a 32-bit-truncated copy of the index. A large negative index could pass the check and then be used at full width, reading outside the node set's storage. On CRuby this is an out-of-bounds read that typically crashes the process; on JRuby it is not memory-unsafe but returns an incorrect node. This vulnerability is fixed in 1.19.4.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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