| Name | CVE-2026-6357 |
| Description | pip prior to version 26.1 would run self-update check functionality after installing wheel files which required importing well-known Python modules names. These module imports were intentionally deferred to increase startup time of the pip CLI. The patch changes self-update functionality to run before wheels are installed to prevent newly-installed modules from being imported shortly after the installation of a wheel package. Users should still review package contents prior to installation. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1135110 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python-pip (PTS) | bullseye | 20.3.4-4+deb11u1 | vulnerable |
| bullseye (security) | 20.3.4-4+deb11u2 | vulnerable |
| bookworm | 23.0.1+dfsg-1 | vulnerable |
| trixie | 25.1.1+dfsg-1 | vulnerable |
| forky | 26.1.1+dfsg-1 | fixed |
| sid | 26.1.2+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| python-pip | source | (unstable) | 26.1.1+dfsg-1 | | | 1135110 |
Notes
[trixie] - python-pip <no-dsa> (Minor issue)
[bookworm] - python-pip <no-dsa> (Minor issue)
[bullseye] - python-pip <postponed> (Minor issue, possible execution when installing new Python modules)
https://github.com/pypa/pip/pull/13923
https://github.com/pypa/pip/commit/b369bfc96cc524e00c267e1693290e6599c36bad (26.1)