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[USN-8020-1] libsoup vulnerabilities

Posted on 09 February 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8020-1
February 08, 2026

libsoup3 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in libsoup.

Software Description:
- libsoup3: HTTP client/server library for GNOME

Details:

It was discovered that libsoup did not correctly handle certain
URL-decoded input, which could allow for HTTP header injection. A remote
attacker could possibly use this issue to cause a denial of service or
execute arbitrary code. (CVE-2026-1467, CVE-2026-1536)

It was discovered that libsoup did not correctly handle removal of the
Proxy-Authorization header. A remote attacker could possibly use this
issue to leak sensitive information. (CVE-2026-1539)

Update instructions:

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

Ubuntu 25.10
gir1.2-soup-3.0 3.6.5-4ubuntu0.2
libsoup-3.0-0 3.6.5-4ubuntu0.2
libsoup-3.0-common 3.6.5-4ubuntu0.2
libsoup-3.0-dev 3.6.5-4ubuntu0.2
libsoup-3.0-doc 3.6.5-4ubuntu0.2
libsoup-3.0-tests 3.6.5-4ubuntu0.2

Ubuntu 24.04 LTS
gir1.2-soup-3.0 3.4.4-5ubuntu0.7
libsoup-3.0-0 3.4.4-5ubuntu0.7
libsoup-3.0-common 3.4.4-5ubuntu0.7
libsoup-3.0-dev 3.4.4-5ubuntu0.7
libsoup-3.0-doc 3.4.4-5ubuntu0.7
libsoup-3.0-tests 3.4.4-5ubuntu0.7

Ubuntu 22.04 LTS
gir1.2-soup-3.0 3.0.7-0ubuntu1+esm7
Available with Ubuntu Pro
libsoup-3.0-0 3.0.7-0ubuntu1+esm7
Available with Ubuntu Pro
libsoup-3.0-common 3.0.7-0ubuntu1+esm7
Available with Ubuntu Pro
libsoup-3.0-dev 3.0.7-0ubuntu1+esm7
Available with Ubuntu Pro
libsoup-3.0-doc 3.0.7-0ubuntu1+esm7
Available with Ubuntu Pro
libsoup-3.0-tests 3.0.7-0ubuntu1+esm7
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8020-1
CVE-2026-1467, CVE-2026-1536, CVE-2026-1539

Package Information:
https://launchpad.net/ubuntu/+source/libsoup3/3.6.5-4ubuntu0.2
https://launchpad.net/ubuntu/+source/libsoup3/3.4.4-5ubuntu0.7

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