CVE-2026-57434

HIGH

Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes

Title source: cna

Description

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. This caused a NULL pointer dereference that could crash the process. This vulnerability is fixed in 1.19.4.

References (1)

Core 1

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-9cv2-cfxc-v4v2

Scores

CVSS v3 7.5

EPSS 0.0036

EPSS Percentile 28.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (2)

nokogiri/nokogiri < 1.19.4

sparklemotion/nokogiri < 1.19.4

Published Jun 25, 2026

Tracked Since Jun 25, 2026