[USN-8344-3] pip vulnerability

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-8344-3
June 03, 2026

python-pip vulnerability
==========================================================================

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

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

A regression was fixed in pip.

Software Description:
- python-pip: Python package installer

Details:

USN-8344-1 introduced a regression in pip. This update provides a complete fix for this issue..

We apologize for the inconvenience.

Original advisory details:

 It was discovered that pip's bundled urllib3 library improperly
 handled streaming decompression of highly compressed data. A remote
 attacker could possibly use this issue to cause pip to consume excessive resources,
 leading to a denial of service. (CVE-2025-66471)

Update instructions:

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

Ubuntu 26.04 LTS
  python3-pip                     25.1.1+dfsg-1ubuntu2+esm3
                                  Available with Ubuntu Pro
  python3-pip-whl                 25.1.1+dfsg-1ubuntu2+esm3
                                  Available with Ubuntu Pro

Ubuntu 24.04 LTS
  python3-pip                     24.0+dfsg-1ubuntu1.3+esm3
                                  Available with Ubuntu Pro
  python3-pip-whl                 24.0+dfsg-1ubuntu1.3+esm3
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  python3-pip                     22.0.2+dfsg-1ubuntu0.7+esm3
                                  Available with Ubuntu Pro
  python3-pip-whl                 22.0.2+dfsg-1ubuntu0.7+esm3
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8344-3
  https://ubuntu.com/security/notices/USN-8344-2
  https://ubuntu.com/security/notices/USN-8344-1
  CVE-2025-66471
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