Critical Security Update for perl-XML-LibXML: Denial of Service Vulnerability
Summary
ALSA-2026:39547: Important: perl-XML-LibXML security update. Affects perl-XML-LibXML versions < 1:2.0210-4.el10_2.1. Fixed in 1:2.0210-4.el10_2.1. How to fix ↓
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Background
perl-XML-LibXML is a Perl module that provides an interface to the GNOME libxml2 library, enabling Perl developers to parse and manipulate XML files efficiently. This module is known for its robust validating XML parser and high-performance Document Object Model (DOM) implementation, making it a popular choice for XML handling in Perl applications. However, it has recently been identified to have a security vulnerability that could lead to denial of service under specific conditions.
Vulnerability Detail
The vulnerability identified as CVE-2026-8177 allows for a Denial of Service (DoS) attack through the use of truncated UTF-8 sequences in XML node names. This issue arises when the XML parser encounters improperly formatted UTF-8 data, which can cause the parser to crash or become unresponsive. The ramifications of this vulnerability can be severe, as it may lead to application downtime and service unavailability, affecting users and systems relying on the affected Perl module.
How To Fix
Minimum fixed version
1:2.0210-4.el10_2.1
This is the first release that contains the fix.
sudo dnf update perl-XML-LibXMLTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, consider implementing input validation to sanitize XML node names and prevent the use of truncated UTF-8 sequences. This can help mitigate the risk of triggering the vulnerability until a proper update can be applied.
Conclusion
The perl-XML-LibXML module has a critical vulnerability that can lead to Denial of Service attacks. It is crucial to update to the latest patched version to ensure the security and stability of applications using this module. Additionally, implementing input validation can serve as a temporary measure until the update is applied.
See every vulnerability recorded for perl-XML-LibXML →
FAQ
CVE-2026-8177 is a security vulnerability in the perl-XML-LibXML module that allows for Denial of Service attacks via truncated UTF-8 in XML node names.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Simply upload your manifest file like package-lock.json to check for vulnerabilities.
Exploiting this vulnerability can lead to application crashes and service unavailability, impacting users and dependent systems.
Yes, a patched version of perl-XML-LibXML is available. Update to version 1:2.0210-4.el10_2.1 or later to resolve the issue.
Implement input validation to sanitize XML node names and prevent the use of truncated UTF-8 sequences as a temporary workaround.
Related vulnerabilities
Recent vulnerabilities recorded for perl-XML-LibXML.
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