Is CVE-2026-57434 actively exploited?

No active exploitation of CVE-2026-57434 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-57434 be exploited remotely?

Yes. CVE-2026-57434 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-57434?

CVE-2026-57434 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-57434

HIGH

CVE-2026-57434

CWE-476Published: June 25, 2026· Updated: Jun 26, 2026

7.5

CVSS v3.1

EPSS:0.33%probability of exploitation in 30 daysPercentile:25.0th

Official 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.

NVD Source

Technical Analysis

CVE-2026-57434 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.