CVE-2026-6732

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

CVE-2026-6732 is fixed in 6 products on 1 platform, first by libxml2-16 2.14.5+dfsg-0.2ubuntu0.2, released April 23, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0063

50th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
libxml2 · Debian 14	2.15.3+dfsg-1	DEBIAN-CVE-2026-6732	Apr 23, 2026
libxml2 · opensuse-leap 16.0	2.13.8-160000.5.1	OPENSUSE-SU-2026:21317-1	Jul 13, 2026
libxml2 · sles 16.0	2.13.8-160000.5.1	SUSE-SU-2026:22636-1	Jul 13, 2026
libxml2-16 · Ubuntu 25.10 (questing)	2.14.5+dfsg-0.2ubuntu0.2	libxml2-16 2.14.5+dfsg-0.2ubuntu0.2	Apr 23, 2026
libxml2-16 · Ubuntu 26.04.1 LTS (resolute)	2.15.2+dfsg-0.1ubuntu0.1	libxml2-16 2.15.2+dfsg-0.1ubuntu0.1	Apr 23, 2026
libxml2-python · opensuse-leap 16.0	2.13.8-160000.5.1	OPENSUSE-SU-2026:21317-1	Jul 13, 2026
libxml2-python · sles 16.0	2.13.8-160000.5.1	SUSE-SU-2026:22636-1	Jul 13, 2026
libxml2-source · Ubuntu 26.04.1 LTS (resolute)	2.15.2+dfsg-0.1ubuntu0.1	libxml2-source 2.15.2+dfsg-0.1ubuntu0.1	Apr 23, 2026
libxml2-utils · Ubuntu 25.10 (questing)	2.14.5+dfsg-0.2ubuntu0.2	libxml2-utils 2.14.5+dfsg-0.2ubuntu0.2	Apr 23, 2026
libxml2-utils · Ubuntu 26.04.1 LTS (resolute)	2.15.2+dfsg-0.1ubuntu0.1	libxml2-utils 2.15.2+dfsg-0.1ubuntu0.1	Apr 23, 2026
python3-libxml2 · Ubuntu 25.10 (questing)	2.14.5+dfsg-0.2ubuntu0.2	python3-libxml2 2.14.5+dfsg-0.2ubuntu0.2	Apr 23, 2026
python3-libxml2 · Ubuntu 26.04.1 LTS (resolute)	2.15.2+dfsg-0.1ubuntu0.1	python3-libxml2 2.15.2+dfsg-0.1ubuntu0.1	Apr 23, 2026

Details

Published
April 23, 2026
Weakness
Access of Resource Using Incompatible Type ('Type Confusion')
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6732

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-6732">CVE-2026-6732 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.