---
id: CVE-2025-46420
title: A flaw was found in libsoup
summary: >-
  A flaw was found in libsoup. It is vulnerable to memory leaks in the
  soup_header_parse_quality_list() function when parsing a quality list that
  contains elements with all zeroes.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
published: '2025-04-24'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-46420'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2025:4439'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:4440'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:4508'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:4538'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:4560'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:4568'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:4609'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:4624'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:7436'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2025-46420'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2361963'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/libsoup/-/issues/438'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00584
epssPercentile: 0.45555
ingestedAt: '2026-06-29T13:24:34.199Z'
---

## Overview

A flaw was found in libsoup. It is vulnerable to memory leaks in the soup_header_parse_quality_list() function when parsing a quality list that contains elements with all zeroes.

## Remediation

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