CVE-2026-57434 PUBLISHED

Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes

Assigner: GitHub_M
Reserved: 24.06.2026 Published: 25.06.2026 Updated: 25.06.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
CVSS Score: 1.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	sparklemotion
Product	nokogiri
Versions	Version < 1.19.4 is affected

References

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

Problem Types

CWE-476: NULL Pointer Dereference CWE