---
id: CVE-2026-0992
title: A flaw was found in the libxml2 library
summary: >-
  A flaw was found in the libxml2 library. This uncontrolled resource
  consumption vulnerability occurs when processing XML catalogs that contain
  repeated <nextCatalog> elements pointing to the same downstream catalog. A
  remote attacker can…
severity: low
cvss: 2.9
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-400
published: '2026-01-15'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-0992'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:7519'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-0992'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2429975'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/libxml2/-/issues/1019'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00465
epssPercentile: 0.39515
ingestedAt: '2026-06-29T21:48:47.226Z'
---

## Overview

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.