Packages
- python-pip - Python package installer
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...
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)
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 | python3-pip – 25.1.1+dfsg-1ubuntu2+esm2 | ||
| python3-pip-whl – 25.1.1+dfsg-1ubuntu2+esm2 | |||
| 24.04 LTS noble | python3-pip – 24.0+dfsg-1ubuntu1.3+esm2 | ||
| python3-pip-whl – 24.0+dfsg-1ubuntu1.3+esm2 | |||
| 22.04 LTS jammy | python3-pip – 22.0.2+dfsg-1ubuntu0.7+esm2 | ||
| python3-pip-whl – 22.0.2+dfsg-1ubuntu0.7+esm2 | |||
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