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CVE-2026-8177

7.5 · HIGH

XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.

Published May 10, 2026CWE-125EPSS 0.88%

Overview

CVE-2026-8177 is a high-severity vulnerability. It was published on May 10, 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

XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.

A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory.

Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

GitHubgithub.com/cpan-authors/XML-LibXML/commit/15652bd905a6c9dda59a81b14d4766adbbae2ea8.patchGitHubgithub.com/cpan-authors/XML-LibXML/issues/146GitHubgithub.com/cpan-authors/XML-LibXML/pull/149Refwww.openwall.com/lists/oss-security/2026/05/10/8Refwww.openwall.com/lists/oss-security/2026/05/11/2Refaccess.redhat.com/errata/RHSA-2026:39547Refaccess.redhat.com/errata/RHSA-2026:39553Refaccess.redhat.com/errata/RHSA-2026:39878Refaccess.redhat.com/security/cve/CVE-2026-8177Refbugzilla.redhat.com/show_bug.cgi?id=2468684

How CyberStrike helps

Frequently asked questions

What is CVE-2026-8177?

CVE-2026-8177 is a high-severity vulnerability. It was published on May 10, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-8177?

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-2026-8177?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2026-8177?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-8177 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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