Nokogiri: Possible Out-of-Bounds Read in `Nokogiri::XML::NodeSet#[]`_CVE-2026-57235

6.3 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

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.

Basic Information

ID CVE-2026-57235

Source GitHub_M

Published Jun 25, 2026 at 14:31

Affected Product

Vendor sparklemotion

Product nokogiri

Version < 1.19.4

Affected Versions sparklemotion nokogiri < 1.19.4

CWE Classification

CWE-125 CWE-190

References

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

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