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

High severity · published Apr 23, 2026

CVE-2026-6732

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

7.5

CVSS

0.6%

EPSS

On KEV

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 vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.6% · higher than 50% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Red Hat Hardened Images · Red Hat

All versions, or not specified · source: vendor

Red Hat JBoss Core Services · Red Hat

All versions, or not specified · source: vendor

Aix · Ibm

7.2.5 before 7.2.5.12; 7.3.2 before 7.3.3.3; 7.3.4 · source: NVD

Enterprise Linux · Redhat

6.0; 7.0; 8.0; 9.0; 10.0 · source: NVD

Hardened Images · Redhat

All versions, or not specified · source: NVD

Jboss Core Services · Redhat

All versions, or not specified · source: NVD

Libxml2 · Xmlsoft

2.13.0 before 2.15.3 · source: NVD

Openshift Container Platform · Redhat

4.0 · source: NVD

Vios · Ibm

4.1.0 before 4.1.1.30; 4.1.2.0 · source: NVD

In the news

VulnerabilityHigh

Hitachi Energy RTU500 Product

View CSAF Summary Hitachi Energy is aware of vulnerabilities that affect RTU500 product versions listed in this document. These vulnerabilities if exploited can have impact on confidentiality, integrity and availability of the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation. The following versions of Hitachi Energy RTU500 Product are affected: RTU500 series CMU Firmware vers:RTU500_series_CMU_Firmware/>=13.5.1|<=13.5.4, vers:RTU500_series_CMU_Firmware/>=13.6.1|<=13.6.3, vers:RTU500_series_CMU_Firmware/>=13.7.1|<=13.7.8, vers:RTU500_series_CMU_Firmware/>=13.8.1|<=13.8.2, vers:RTU500_series_CMU_Firmware/>=12.7.1|<=12.7.7 (CVE-2026-17539, CVE-2026-28388, CVE-2026-6732, CVE-2026-6653, CVE-2026-6276, CVE-2026-9079, CVE-2026-11856, CVE-2026-8927, CVE-2026-8932, CVE-2026-17539, CVE-2026-28388, CVE-2026-6732, CVE-2026-6653, CVE-2026-6276, CVE-2026-9079, CVE-2026-11856, CVE-2026-8927, CVE-2026-8932, CVE-2026-17539, CVE-2026-28388, CVE-2026-6732, CVE-2026-6653, CVE-2026-6276, CVE-2026-9079, CVE-2026-11856, CVE-2026-8927, CVE-2026-8932, CVE-2026-17539, CVE-2026-28388, CVE-2026-6732, CVE-2026-6653, CVE-2026-6276, CVE-2026-9079, CVE-2026-11856, CVE-2026-8927, CVE-2026-8932, CVE-2026-17539, CVE-2026-28388, CVE-2026-6653) CVSS Vendor Equipment v3 8.8 Hitachi Energy RTU500 series CMU Firmware 7 Vulnerabilities NULL Pointer Dereference, ...

CVE-2026-17539 CVE-2026-28388 CVE-2026-6732

Oct 20, 2026·US-CERT ICS Advisories

Affected product

Red Hat Hardened Images

Red Hat

All Red Hat Hardened Images CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-6732

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-6732

Third Party Advisory