USN-8890-1: libsoup vulnerabilities

Publication date

6 October 2026

Overview

Several security issues were fixed in libsoup.


Packages

  • libsoup2.4 - HTTP client/server library for GNOME
  • libsoup3 - HTTP client/server library for GNOME

Details

It was discovered that libsoup incorrectly handled certain HTTP/2 requests.
A remote attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS.
(CVE-2026-4271)

It was discovered that libsoup incorrectly handled certain HTTPS proxy
connections. A remote attacker could possibly use this issue to obtain
sensitive information. This issue only affected Ubuntu 22.04 LTS, Ubuntu
24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-5119)

It was discovered that libsoup incorrectly parsed certain chunked HTTP
requests. A remote attacker could possibly use this issue to bypass
security controls. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04
LTS, and Ubuntu 26.04 LTS. (CVE-2026-6324)

It was discovered that libsoup incorrectly handled proxy...

It was discovered that libsoup incorrectly handled certain HTTP/2 requests.
A remote attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS.
(CVE-2026-4271)

It was discovered that libsoup incorrectly handled certain HTTPS proxy
connections. A remote attacker could possibly use this issue to obtain
sensitive information. This issue only affected Ubuntu 22.04 LTS, Ubuntu
24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-5119)

It was discovered that libsoup incorrectly parsed certain chunked HTTP
requests. A remote attacker could possibly use this issue to bypass
security controls. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04
LTS, and Ubuntu 26.04 LTS. (CVE-2026-6324)

It was discovered that libsoup incorrectly handled proxy authentication
credentials. A remote attacker could possibly use this issue to obtain
sensitive information. (CVE-2026-66339)

It was discovered that libsoup incorrectly handled certain HTTP Range
headers. A remote attacker could possibly use this issue to cause a denial
of service. (CVE-2026-77014, CVE-2026-77680)

It was discovered that libsoup incorrectly handled certain HTTP/2
connections. A remote attacker could possibly use this issue to obtain
sensitive information or execute arbitrary code. This issue only affected
Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-85197)

It was discovered that libsoup incorrectly handled certain HTTP/2
transfers. A remote attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04
LTS, and Ubuntu 26.04 LTS. (CVE-2026-85534)


Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.04 LTS resolute gir1.2-soup-2.4 –  2.74.3-10.1ubuntu5+esm3  
gir1.2-soup-3.0 –  3.6.6-1ubuntu0.1
libsoup-2.4-1 –  2.74.3-10.1ubuntu5+esm3  
libsoup-3.0-0 –  3.6.6-1ubuntu0.1
libsoup-3.0-common –  3.6.6-1ubuntu0.1
libsoup-3.0-dev –  3.6.6-1ubuntu0.1
libsoup-gnome-2.4-1 –  2.74.3-10.1ubuntu5+esm3  
libsoup-gnome2.4-dev –  2.74.3-10.1ubuntu5+esm3  
libsoup2.4-common –  2.74.3-10.1ubuntu5+esm3  
libsoup2.4-dev –  2.74.3-10.1ubuntu5+esm3  
24.04 LTS noble gir1.2-soup-2.4 –  2.74.3-6ubuntu1.9
gir1.2-soup-3.0 –  3.4.4-5ubuntu0.9
libsoup-2.4-1 –  2.74.3-6ubuntu1.9
libsoup-3.0-0 –  3.4.4-5ubuntu0.9
libsoup-3.0-common –  3.4.4-5ubuntu0.9
libsoup-3.0-dev –  3.4.4-5ubuntu0.9
libsoup-gnome-2.4-1 –  2.74.3-6ubuntu1.9
libsoup-gnome2.4-dev –  2.74.3-6ubuntu1.9
libsoup2.4-common –  2.74.3-6ubuntu1.9
libsoup2.4-dev –  2.74.3-6ubuntu1.9
22.04 LTS jammy gir1.2-soup-2.4 –  2.74.2-3ubuntu0.9
gir1.2-soup-3.0 –  3.0.7-0ubuntu1+esm9  
libsoup-3.0-0 –  3.0.7-0ubuntu1+esm9  
libsoup-3.0-common –  3.0.7-0ubuntu1+esm9  
libsoup-3.0-dev –  3.0.7-0ubuntu1+esm9  
libsoup-gnome2.4-1 –  2.74.2-3ubuntu0.9
libsoup-gnome2.4-dev –  2.74.2-3ubuntu0.9
libsoup2.4-1 –  2.74.2-3ubuntu0.9
libsoup2.4-common –  2.74.2-3ubuntu0.9
libsoup2.4-dev –  2.74.2-3ubuntu0.9
20.04 LTS focal gir1.2-soup-2.4 –  2.70.0-1ubuntu0.5+esm4  
libsoup-gnome2.4-1 –  2.70.0-1ubuntu0.5+esm4  
libsoup-gnome2.4-dev –  2.70.0-1ubuntu0.5+esm4  
libsoup2.4-1 –  2.70.0-1ubuntu0.5+esm4  
libsoup2.4-dev –  2.70.0-1ubuntu0.5+esm4  
18.04 LTS bionic gir1.2-soup-2.4 –  2.62.1-1ubuntu0.4+esm9  
libsoup-gnome2.4-1 –  2.62.1-1ubuntu0.4+esm9  
libsoup-gnome2.4-dev –  2.62.1-1ubuntu0.4+esm9  
libsoup2.4-1 –  2.62.1-1ubuntu0.4+esm9  
libsoup2.4-dev –  2.62.1-1ubuntu0.4+esm9  
16.04 LTS xenial gir1.2-soup-2.4 –  2.52.2-1ubuntu0.3+esm8  
libsoup-gnome2.4-1 –  2.52.2-1ubuntu0.3+esm8  
libsoup-gnome2.4-dev –  2.52.2-1ubuntu0.3+esm8  
libsoup2.4-1 –  2.52.2-1ubuntu0.3+esm8  
libsoup2.4-dev –  2.52.2-1ubuntu0.3+esm8  

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