VDB-359284 · CVE-2026-6732 · ID 1097

libxml2 XML Schema Definition type confusion

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in libxml2. This affects an unknown part of the component XML Schema Definition Handler. Executing a manipulation can lead to type confusion. The identification of this vulnerability is CVE-2026-6732. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in libxml2 (affected version not known) and classified as problematic. This vulnerability affects some unknown functionality of the component XML Schema Definition Handler. The manipulation with an unknown input leads to a type confusion vulnerability. The CWE definition for the vulnerability is CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2026-6732 since 04/21/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 310046 (Linux Distros Unpatched Vulnerability : CVE-2026-6732), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at gitlab.gnome.org.

The vulnerability is also documented in the vulnerability database at Tenable (310046). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Document Processing Software

Name

libxml2

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector (redhat): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 310046
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-6732

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: gitlab.gnome.org

Timelineinfo

04/21/2026 CVE reserved
04/24/2026 +3 days Advisory disclosed
04/24/2026 +0 days VulDB entry created
05/17/2026 +23 days VulDB entry last update

Sourcesinfo

Advisory: 1097
Status: Confirmed

CVE: CVE-2026-6732 (🔒)
GCVE (CVE): GCVE-0-2026-6732
GCVE (VulDB): GCVE-100-359284

Entryinfo

Created: 04/24/2026 07:49
Updated: 05/17/2026 09:05
Changes: 04/24/2026 07:49 (63), 04/24/2026 08:14 (2), 05/17/2026 09:05 (11)
Complete: 🔍
Cache ID: 216::103