PT-2026-39665 · Pypi+3 · Urllib3+3
CVSS v4.0
8.2
High
| Vector | AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
Name of the Vulnerable Software and Affected Versions
urllib3 versions 1.23 through 2.6.x
Description
Sensitive headers, specifically
Authorization, Cookie, and Proxy-Authorization, are forwarded during cross-origin redirects when using the low-level API via ProxyManager.connection from url().urlopen(..., assert same host=False). While high-level APIs like urllib3.request(), PoolManager.request(), and ProxyManager.request() strip these headers by default, the low-level flow fails to do so.Recommendations
Upgrade to version 2.7.0 or later.
Avoid using the low-level redirect flow for cross-origin redirects or switch to
ProxyManager.request().Exploit
Fix
Information Disclosure
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Rocky Linux
Ubuntu
Urllib3