CVE-2026-6732

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

HIGH
7.5
CVSS Score
Published: April 23, 2026 at 10:19 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
7 products affected across 3 vendorsEnterprise LinuxAIXOpenShift Container Platform

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

7.2.5 ≤ v < 7.2.5.127.3.2 ≤ v < 7.3.3.37.3.4
Affected range stops below 7.2.5.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.3.3.3, so it looks safe — our inference, not a vendor statement
4.1.0 ≤ v < 4.1.1.304.1.2.0
Affected range stops below 4.1.1.30, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 10 (unaffected)
Vendor states this is fixed in 6 (unaffected)
Vendor states this is fixed in 7 (unaffected)
Vendor states this is fixed in 8 (unaffected)
Vendor states this is fixed in 9 (unaffected)
All versions
Vendor states this is fixed in 2.15.3-0.1.hum1 (unaffected)
Vendor states this is fixed in 4 (unaffected)
2.13.0 ≤ v < 2.15.3
Affected range stops below 2.15.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (5)

VDB Entryx_refsource_REDHATThird Party Advisory
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-6732
Issue Trackingx_refsource_REDHATThird Party Advisory
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2461300
ExploitIssue TrackingThird Party Advisory
Source: cverecord
https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097
Issue TrackingThird Party Advisory
Source: cverecord
https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:11503

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-843

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