PYSEC-2026-141

At a glance

Published: 2026-05-13 16:16 UTC
Updated: 2026-05-20 09:19 UTC
CVE: CVE-2026-44431
Aliases: GHSA-qccp-gfcp-xxvc
CVSS_V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Affected packages

Package	Versions
PyPI · urllib3	introduced 1.23, fixed 2.7.0

References

https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc ADVISORY

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — PyPA Advisory Database