USN-8523-1: libsoup vulnerabilities

Publication date

9 July 2026

Overview

Several security issues were fixed in libsoup.


Packages

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

Details

Eric Su and Samuel Dainard discovered that libsoup incorrectly handled
content with zero-length resources. An attacker could possibly use this
issue to trigger a buffer over-read, resulting in information disclosure
or a denial of service. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and
Ubuntu 26.04 LTS. (CVE-2026-2369)

Kona Arctic discovered that libsoup did not properly protect sensitive
cookies when establishing HTTPS tunnels through an HTTP proxy. An
attacker could possibly use this issue to intercept session cookies,
resulting in session hijacking or user impersonation. (CVE-2026-5119)

Eric Su and Samuel Dainard discovered that libsoup incorrectly handled
content with zero-length resources. An attacker could possibly use this
issue to trigger a buffer over-read, resulting in information disclosure
or a denial of service. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and
Ubuntu 26.04 LTS. (CVE-2026-2369)

Kona Arctic discovered that libsoup did not properly protect sensitive
cookies when establishing HTTPS tunnels through an HTTP proxy. An
attacker could possibly use this issue to intercept session cookies,
resulting in session hijacking or user impersonation. (CVE-2026-5119)

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 libsoup-2.4-1 –  2.74.3-10.1ubuntu5+esm1  
libsoup-gnome-2.4-1 –  2.74.3-10.1ubuntu5+esm1  
libsoup2.4-common –  2.74.3-10.1ubuntu5+esm1  
libsoup2.4-dev –  2.74.3-10.1ubuntu5+esm1  
libsoup2.4-tests –  2.74.3-10.1ubuntu5+esm1  
25.10 questing libsoup-2.4-1 –  2.74.3-10.1ubuntu4.1
libsoup-gnome-2.4-1 –  2.74.3-10.1ubuntu4.1
libsoup2.4-common –  2.74.3-10.1ubuntu4.1
libsoup2.4-dev –  2.74.3-10.1ubuntu4.1
libsoup2.4-tests –  2.74.3-10.1ubuntu4.1
24.04 LTS noble libsoup-2.4-1 –  2.74.3-6ubuntu1.7
libsoup-gnome-2.4-1 –  2.74.3-6ubuntu1.7
libsoup2.4-common –  2.74.3-6ubuntu1.7
libsoup2.4-dev –  2.74.3-6ubuntu1.7
libsoup2.4-tests –  2.74.3-6ubuntu1.7
22.04 LTS jammy libsoup-gnome2.4-1 –  2.74.2-3ubuntu0.7
libsoup2.4-1 –  2.74.2-3ubuntu0.7
libsoup2.4-common –  2.74.2-3ubuntu0.7
libsoup2.4-dev –  2.74.2-3ubuntu0.7
libsoup2.4-tests –  2.74.2-3ubuntu0.7
20.04 LTS focal libsoup-gnome2.4-1 –  2.70.0-1ubuntu0.5+esm2  
libsoup2.4-1 –  2.70.0-1ubuntu0.5+esm2  
libsoup2.4-dev –  2.70.0-1ubuntu0.5+esm2  
libsoup2.4-tests –  2.70.0-1ubuntu0.5+esm2  
18.04 LTS bionic libsoup-gnome2.4-1 –  2.62.1-1ubuntu0.4+esm7  
libsoup2.4-1 –  2.62.1-1ubuntu0.4+esm7  
libsoup2.4-dev –  2.62.1-1ubuntu0.4+esm7  
16.04 LTS xenial libsoup-gnome2.4-1 –  2.52.2-1ubuntu0.3+esm6  
libsoup2.4-1 –  2.52.2-1ubuntu0.3+esm6  
libsoup2.4-dev –  2.52.2-1ubuntu0.3+esm6  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.


Have additional questions?

Talk to a member of the team ›