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Vulnerability record · CVE-2026-6732 · published 23 April 2026

CVE-2026-6732: Xmlsoft libxml2 type confusion vulnerability

Xmlsoft · Libxml2

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.

7.5 CVSS 3.1 High EPSS 0.94% · top 40.6% CWE-843 · Type confusion
7.5CVSS 3.1 base score
0.94%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
5References, 1 tagged exploit
31 Aug 2026Last modified by NVD

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

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:11503 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-6732 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2461300 Issue TrackingThird Party Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097 ExploitIssue TrackingThird Party Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411 Issue TrackingThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-6732), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.