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Ubuntu 26.04 Pip Critical Denial Of Service Vuln 2025-66471

ubuntu
Calendar Grey June 3, 2026
Dist Ubuntu Esm H88
A regression in pip was fixed that could lead to potential DoS attacks. Update your Ubuntu system to improve security.
A regression was fixed in pip.

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)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu pip python-pip

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8344-3

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu pip python-pip

Package Information

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