CVE-2026-27942
7.5 · HIGHOverview
CVE-2026-27942 is a high-severity vulnerability affecting naturalintelligence fast-xml-parser. It was published on February 26, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from naturalintelligence. Update fast-xml-parser to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| naturalintelligence | fast-xml-parser | >= 0, < 4.5.4 | Affected |
Frequently Asked Questions
What is CVE-2026-27942?
CVE-2026-27942 is a high-severity vulnerability affecting naturalintelligence fast-xml-parser. It was published on February 26, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-27942?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-27942?
Check the references section for vendor advisories and patches from naturalintelligence. Update fast-xml-parser to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-27942?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-27942 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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