---
id: CVE-2026-2443
title: >-
  Libsoup: out-of-bounds read in libsoup handle_partial_get() leading to heap
  information disclosure
summary: >-
  A flaw was identified in libsoup, a widely used HTTP library in GNOME-based
  systems. When processing specially crafted HTTP Range headers, the library may
  improperly validate requested byte ranges. In certain build configurations,
  this c…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-125
vendor: Red Hat
product: libsoup3
affected:
  - libsoup3 (all versions)
  - libsoup (all versions)
  - libsoup (all versions)
  - libsoup (all versions)
  - libsoup (all versions)
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-02-13T12:40:40.304156Z'
published: '2026-02-13'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T18:09:13.076Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-2443'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-2443'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2439671'
    label: RHBZ#2439671
  - url: 'https://gitlab.gnome.org/GNOME/libsoup/-/issues/487'
tags:
  - cve.org
epss: 0.00488
epssPercentile: 0.42282
ingestedAt: '2026-11-06T19:01:36.638Z'
---

## Overview

A flaw was identified in libsoup, a widely used HTTP library in GNOME-based systems. When processing specially crafted HTTP Range headers, the library may improperly validate requested byte ranges. In certain build configurations, this could allow a remote attacker to access portions of server memory beyond the intended response. Exploitation requires a vulnerable configuration and access to a server using the embedded SoupServer component.

## Affected

- `libsoup3 (all versions)`
- `libsoup (all versions)`
- `libsoup (all versions)`
- `libsoup (all versions)`
- `libsoup (all versions)`

## Remediation

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

### Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.