Is CVE-2026-27942 actively exploited?

No active exploitation of CVE-2026-27942 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27942 be exploited remotely?

Yes. CVE-2026-27942 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27942?

CVE-2026-27942 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.04%.

HOME VULNERABILITIESCVE-2026-27942

HIGH

CVE-2026-27942

CWE-120Published: February 26, 2026· Updated: Mar 2, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.1th

Official Description

fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. Prior to version 5.3.8, the application crashes with stack overflow when user use XML builder with `preserveOrder:true`. Version 5.3.8 fixes the issue. As a workaround, use XML builder with `preserveOrder:false` or check the input data before passing to builder.

NVD Source

Technical Analysis

CVE-2026-27942 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.