Is CVE-2026-57437 actively exploited?

No active exploitation of CVE-2026-57437 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-57437 be exploited remotely?

Yes. CVE-2026-57437 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-57437?

CVE-2026-57437 has a CVSS score of 5.3 (MEDIUM).

HOME VULNERABILITIESCVE-2026-57437

MEDIUM

CVE-2026-57437

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

5.3

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::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression could read invalid memory and potentially segfault. This is only reachable when application code constructs an XPathContext directly and lets the document become unreachable while continuing to use the context. The normal Document#xpath, #css, and related search methods are not affected, and it is not triggerable by malicious document input. This vulnerability is fixed in 1.19.4.

NVD Source

Technical Analysis

CVE-2026-57437 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.

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