Denial of Service Vulnerability in libxml2 Affecting Multiple Applications
CVE-2026-6732

6.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
23 April 2026

What is CVE-2026-6732?

A vulnerability exists in libxml2 when it processes specially crafted XML Schema Definition (XSD) documents containing internal entity references. An attacker can exploit this flaw by delivering a crafted document, resulting in a type confusion error that leads to application crashes. This causes a denial of service, rendering the affected systems or applications unavailable.

References

https://access.redhat.com/security/cve/CVE-2026-6732
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2461300
issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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