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Vulnerability IntelligenceCVE-2026-57434

CVE-2026-57434

HIGH7.5

Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes

Published Jun 25, 2026

Modified 2 weeks ago

Details

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

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

https://www.cve.org/CVERecord?id=CVE-2026-57434

CVSS Analysis

CVSS v4.0

1.7

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Attack Requirements

PresentAT:P

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

NoneVI:N

Vuln. Availability

LowVA:L

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

1.7/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

Weakness Type (CWE)

Memory Safety

NULL Pointer Dereference

Ecosystems

Timeline

PublishedJun 25, 2026

ModifiedJun 25, 2026

CVE-2026-57434 | Mondoo Vulnerability Intelligence