CVE-2026-44431
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.
- Score
- CVSS 4.0 8.2 High
- Status
- Modified - security-advisories@github.com
- Published
- 2026-05-13
- Last modified
- 2026-06-26
- Weaknesses
- CWE-200
Affected products
References
- https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc
- https://lists.debian.org/debian-lts-announce/2026/06/msg00040.html
