Ubuntu USN · USN-8344-2

pip regression

Published: Fri, 29 May 2026 19:53

Summary

USN-8344-1 introduced a regression in pip.

Details

USN-8344-1 fixed vulnerabilities in pip. On Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS the patches for CVE-2025-66471 caused a regression when using pip. The patches for CVE-2025-66471 have been temporarily reverted pending investigation. We apologize for the inconvenience. Original advisory details: It was discovered that pip incorrectly handled TLS certificate verification in session connections. If a session was first used with certificate verification disabled, subsequent requests to the same host would also skip verification regardless of the session's current settings. A remote attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. (CVE-2024-35195) It was discovered that pip's bundled urllib3 library did not limit the number of decompression steps when processing HTTP responses. A remote attacker could possibly use this issue to cause pip to consume excessive resources, leading to a denial of service. (CVE-2025-66418) 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)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu jammy

python-pip→22.0.2+dfsg-1ubuntu0.7+esm2apt_upgrade
Standard apt upgrade. Install 22.0.2+dfsg-1ubuntu0.7+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-pip
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pip→22.0.2+dfsg-1ubuntu0.7+esm2apt_upgrade
Standard apt upgrade. Install 22.0.2+dfsg-1ubuntu0.7+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pip
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pip-whl→22.0.2+dfsg-1ubuntu0.7+esm2apt_upgrade
Standard apt upgrade. Install 22.0.2+dfsg-1ubuntu0.7+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pip-whl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

python-pip→24.0+dfsg-1ubuntu1.3+esm2apt_upgrade
Standard apt upgrade. Install 24.0+dfsg-1ubuntu1.3+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-pip
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pip→24.0+dfsg-1ubuntu1.3+esm2apt_upgrade
Standard apt upgrade. Install 24.0+dfsg-1ubuntu1.3+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pip
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pip-whl→24.0+dfsg-1ubuntu1.3+esm2apt_upgrade
Standard apt upgrade. Install 24.0+dfsg-1ubuntu1.3+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pip-whl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

python-pip→25.1.1+dfsg-1ubuntu2+esm2apt_upgrade
Standard apt upgrade. Install 25.1.1+dfsg-1ubuntu2+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-pip
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pip→25.1.1+dfsg-1ubuntu2+esm2apt_upgrade
Standard apt upgrade. Install 25.1.1+dfsg-1ubuntu2+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pip
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-pip-whl→25.1.1+dfsg-1ubuntu2+esm2apt_upgrade
Standard apt upgrade. Install 25.1.1+dfsg-1ubuntu2+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-pip-whl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Are YOU affected by USN-8344-2?

5-second check on your actual server. Reads /etc/os-release, uname -r, and dpkg-query; matches against the live USN + Debian Security Tracker feeds; tells you whether USN-8344-2 (and any other live CVE) applies. Anonymous, no signup.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan Read the bash source first

References

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