CVE-2026-57235

Description

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.

PUBLISHED Reserved 2026-06-24 | Published 2026-06-25 | Updated 2026-06-25 | Assigner GitHub_M

Problem types

CWE-125: Out-of-bounds Read

CWE-190: Integer Overflow or Wraparound

Product status

References

github.com/...kogiri/security/advisories/GHSA-5prr-v3j2-97mh

cve.org (CVE-2026-57235)

nvd.nist.gov (CVE-2026-57235)

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