CVE-2026-44431
Public on 2026-05-13
Modified on 2026-05-15
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.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | python-urllib3 | 2026-06-22 | ALAS2-2026-3377 | Fixed |
| Amazon Linux 2023 | python-urllib3 | 2026-06-22 | ALAS2023-2026-1843 | Fixed |
| Amazon Linux 2 - Core | python3-urllib3 | 2026-06-22 | ALAS2-2026-3376 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | CVSSv3 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |