CVE-2026-6732
This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.63% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-843
- Affected
- xmlsoft/libxml2 · redhat/hardened images · redhat/jboss core services · redhat/openshift container platform · redhat/enterprise linux · ibm/vios · ibm/aix
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:11503Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-6732Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2461300Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097Exploit, Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.