CVE-2026-44431 — MEDIUM (5.3)

Q: How severe is CVE-2026-44431?

CVE-2026-44431 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-44431?

Check the references section above for vendor advisories and patch information. Affected products include: Python Urllib3.

Vulnerability 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 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Python	Urllib3	>= 1.23, < 2.7.0

Related Weaknesses (CWE)

CWE-200

References

https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvcMitigationVendor Advisory

FAQ

What is CVE-2026-44431?

CVE-2026-44431 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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=Fal...

How severe is CVE-2026-44431?

CVE-2026-44431 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-44431?

Check the references section above for vendor advisories and patch information. Affected products include: Python Urllib3.