| Name | CVE-2026-44431 |
| Description | urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0. |
| 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) |
| References | DLA-4651-1, DSA-6363-1 |
| Debian Bugs | 1136653 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-urllib3 (PTS) | bullseye | 1.26.5-1~exp1 | vulnerable |
| bullseye (security) | 1.26.5-1~exp1+deb11u4 | fixed | |
| bookworm, bookworm (security) | 1.26.12-1+deb12u4 | fixed | |
| trixie, trixie (security) | 2.3.0-3+deb13u2 | fixed | |
| forky | 2.7.0-1 | fixed | |
| sid | 2.7.0-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-urllib3 | source | bullseye | 1.26.5-1~exp1+deb11u4 | DLA-4651-1 | ||
| python-urllib3 | source | bookworm | 1.26.12-1+deb12u4 | DLA-4651-1 | ||
| python-urllib3 | source | trixie | 2.3.0-3+deb13u2 | DSA-6363-1 | ||
| python-urllib3 | source | (unstable) | 2.7.0-1 | 1136653 |
https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc
Fixed by: https://github.com/urllib3/urllib3/commit/5ec0de499b9166ca71c65ab04f2a7e4eb0d66fcc (2.7.0)