---
id: CVE-2026-1757
title: >-
  A flaw was identified in the interactive shell of the xmllint utility, part of
  the libxml2 project, where memory allocated for user input is not properly
  released under certain conditions
summary: >-
  A flaw was identified in the interactive shell of the xmllint utility, part of
  the libxml2 project, where memory allocated for user input is not properly
  released under certain conditions. When a user submits input consisting only
  of whi…
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
published: '2026-02-02'
updated: '2026-08-21'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-1757'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:7519'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-1757'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2435940'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/libxml2/-/issues/1009'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00206
epssPercentile: 0.09417
ingestedAt: '2026-08-21T13:17:18.278Z'
---

## Overview

A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free the allocated buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system memory and terminate the xmllint process, creating a denial-of-service condition on the local system.

## Remediation

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