CVE-2026-6732

MEDIUM

Libxml2: libxml2: denial of service via crafted xsd-validated document

Title source: cna

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.

References (5)

[Vdb Entry, X_Refsource_Redhat] https://access.redhat.com/security/cve/CVE-2026-6732

[Issue Tracking, X_Refsource_Redhat] https://bugzilla.redhat.com/show_bug.cgi?id=2461300

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2026:11503

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

https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411

Scores

CVSS v3 6.5

EPSS 0.0002

EPSS Percentile 5.5%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-843

Status published

Products (9)

Red Hat/Red Hat Enterprise Linux 10

Red Hat/Red Hat Enterprise Linux 6

Red Hat/Red Hat Enterprise Linux 7

Red Hat/Red Hat Enterprise Linux 8

Red Hat/Red Hat Enterprise Linux 9

Red Hat/Red Hat Hardened Images

Red Hat/Red Hat Hardened Images 2.15.3-0.1.hum1

Red Hat/Red Hat JBoss Core Services

Red Hat/Red Hat OpenShift Container Platform 4

Published Apr 23, 2026

Tracked Since Apr 24, 2026