CVE-2026-57235

HIGH

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 8.2
EPSS 0.0034
EPSS Percentile 26.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-125 CWE-190
Status published
Products (2)
nokogiri/nokogiri < 1.19.4
sparklemotion/nokogiri < 1.19.4
Published Jun 25, 2026
Tracked Since Jun 25, 2026