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CVE-2026-0989

3.7 · LOW

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled.

Published Jan 15, 2026CWE-674EPSS 0.53%

Overview

CVE-2026-0989 is a low-severity vulnerability. It was published on January 15, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.

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

Refaccess.redhat.com/errata/RHSA-2026:7519Refaccess.redhat.com/security/cve/CVE-2026-0989Refbugzilla.redhat.com/show_bug.cgi?id=2429933Refgitlab.gnome.org/GNOME/libxml2/-/issues/998

How CyberStrike helps

Frequently asked questions

What is CVE-2026-0989?

CVE-2026-0989 is a low-severity vulnerability. It was published on January 15, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

How severe is CVE-2026-0989?

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-0989?

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-2026-0989?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-0989 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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