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.
Affected products
xmlsoft: libxml2; redhat: hardened images; redhat: jboss core services; redhat: openshift container platform; redhat: enterprise linux; ibm: vios; ibm: aix
References5
- gitlab.gnome.org/GNOME/libxml2/-/issues/1097 ExploitIssue TrackingThird Party Advisory
- access.redhat.com/errata/RHSA-2026:11503 Third Party Advisory
- access.redhat.com/security/cve/CVE-2026-6732 Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2461300 Issue TrackingThird Party Advisory
- gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411 Issue TrackingThird Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 51 · as of 13 November 2026
- CWE
- CWE-843
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.