---
id: CVE-2026-1467
title: >-
  Libsoup: libsoup: http header injection via specially crafted urls when an
  http proxy is configured
summary: >-
  A flaw was found in libsoup, an HTTP client library. This vulnerability, known
  as CRLF (Carriage Return Line Feed) Injection, occurs when an HTTP proxy is
  configured and the library improperly handles URL-decoded input used to create
  the…
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-93
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: 'no'
  technicalImpact: partial
  timestamp: '2026-01-27T16:54:59.356679Z'
published: '2026-01-27'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T16:40:23.939Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-1467'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-1467'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2433174'
    label: RHBZ#2433174
  - url: 'https://gitlab.gnome.org/GNOME/libsoup/-/issues/488'
tags:
  - cve.org
epss: 0.00374
epssPercentile: 0.31569
ingestedAt: '2026-11-05T22:38:31.376Z'
---

## Overview

A flaw was found in libsoup, an HTTP client library. This vulnerability, known as CRLF (Carriage Return Line Feed) Injection, occurs when an HTTP proxy is configured and the library improperly handles URL-decoded input used to create the Host header. A remote attacker can exploit this by providing a specially crafted URL containing CRLF sequences, allowing them to inject additional HTTP headers or complete HTTP request bodies. This can lead to unintended or unauthorized HTTP requests being forwarded by the proxy, potentially impacting downstream services.

## 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

To mitigate this issue, avoid processing untrusted URLs in applications that use the libsoup library with an HTTP proxy configured. Restricting network access to the HTTP proxy can also limit potential exposure.