CVE-2026-6732

Description

A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable.

CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0006

Probability of exploitation

0.19%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-843 CWE-843

Affected Products

Vendor	Product	Versions
xmlsoft	libxml2	2.13.0 — 2.15.3
redhat	hardened_images	All
redhat	jboss_core_services	All
redhat	openshift_container_platform	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All

References

Exploits

https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097

Other References

https://access.redhat.com/errata/RHSA-2026:11503 https://access.redhat.com/security/cve/CVE-2026-6732 https://bugzilla.redhat.com/show_bug.cgi?id=2461300 https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411

Frequently Asked Questions

What is CVE-2026-6732? +

A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-6732? +

CVE-2026-6732 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0006, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-6732? +

CVE-2026-6732 affects products from redhat, xmlsoft, specifically: enterprise_linux, hardened_images, jboss_core_services, libxml2, openshift_container_platform. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-6732? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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