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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.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-23 | Updated 2026-04-30 | Assigner redhat




MEDIUM: 6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Access of Resource Using Incompatible Type ('Type Confusion')

Product status

Default status
affected

2.15.3-0.1.hum1 (rpm) before *
unaffected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-04-23:Reported to Red Hat.
2026-04-16:Made public.

Credits

Red Hat would like to thank Ariel Schon for reporting this issue.

References

access.redhat.com/errata/RHSA-2026:11503 (RHSA-2026:11503) vendor-advisory

access.redhat.com/security/cve/CVE-2026-6732 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2461300 (RHBZ#2461300) issue-tracking

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

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

cve.org (CVE-2026-6732)

nvd.nist.gov (CVE-2026-6732)

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