Is CVE-2026-57438 actively exploited?

No active exploitation of CVE-2026-57438 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-57438 be exploited remotely?

No. CVE-2026-57438 requires local access to exploit.

What is the CVSS score of CVE-2026-57438?

CVE-2026-57438 has a CVSS score of 6.6 (MEDIUM).

HOME VULNERABILITIESCVE-2026-57438

MEDIUM

CVE-2026-57438

CWE-416Published: June 25, 2026· Updated: Jun 26, 2026

6.6

CVSS v3.1

EPSS:0.09%probability of exploitation in 30 daysPercentile:0.7th

Official Description

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, XInclude substitution performed by Nokogiri::XML::Node#do_xinclude replaced each <xi:include> in place, freeing the include node along with its children (such as <xi:fallback> and its descendants) and any namespaces declared on them. If an application had already exposed one of those nodes or namespaces to Ruby, the corresponding Ruby object was left pointing at freed memory. Using the object could result in invalid reads or writes to memory. This vulnerability is fixed in 1.19.4.

NVD Source

Technical Analysis

CVE-2026-57438 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.6.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.