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Vulnerability · Published Apr 23, 2026 · Assigned by redhat

CVE-2026-6732Libxml2: libxml2: denial of service via crafted xsd-validated document

Medium 6.5

In plain English

A medium-severity type confusion in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.6%top 49.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.21libxml22.13.9-r1ALPINE-CVE-2026-6732
Alpine:v3.22libxml22.13.9-r1ALPINE-CVE-2026-6732
Alpine:v3.23libxml22.13.9-r1ALPINE-CVE-2026-6732
Alpine:v3.24libxml22.13.9-r2ALPINE-CVE-2026-6732
Alpine:v3.23openjdk2121.0.13.0.3_p1-r0ALPINE-CVE-2026-6732
Alpine:v3.24openjdk2121.0.13.0.3_p1-r0ALPINE-CVE-2026-6732
Alpine:v3.23openjdk2525.0.5.0.3_p1-r0ALPINE-CVE-2026-6732
Alpine:v3.24openjdk2525.0.5.0.3_p1-r0ALPINE-CVE-2026-6732
Alpine:v3.23qt6-qtwebengine6.10.3-r3ALPINE-CVE-2026-6732
Alpine:v3.24qt6-qtwebengine6.11.0-r9ALPINE-CVE-2026-6732
Debian:14libxml22.15.3+dfsg-1DEBIAN-CVE-2026-6732
Ubuntu:25.10libxml22.14.5+dfsg-0.2ubuntu0.2USN-8460-1
Ubuntu:25.10libxml22.14.5+dfsg-0.2ubuntu0.2UBUNTU-CVE-2026-6732
Ubuntu:26.04:LTSlibxml22.15.2+dfsg-0.1ubuntu0.1USN-8460-1
Ubuntu:26.04:LTSlibxml22.15.2+dfsg-0.1ubuntu0.1UBUNTU-CVE-2026-6732

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Hardened Images see references
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat JBoss Core Services see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references

Weakness: CWE-843 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References