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CVE-2026-44431 is an information disclosure vulnerability in urllib3, the Python HTTP client library. Affected versions are 1.23 through versions before 2.7.0. When applications use the low-level proxied request path via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False), urllib3 can follow cross-origin redirects while still forwarding sensitive headers to the redirected destination. This behavior fails to properly sanitize headers during cross-origin redirect handling in that specific low-level API flow, potentially exposing credentials or other confidential request metadata to an unintended origin.
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No public exploit code observed for this vulnerability.
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A specific vulnerability identified as CVE-2026-44431 referenced in a Unity Linux local security check advisory; the content provides scoring metadata, publication dates, and notes that no known exploits are available.
A vulnerability listed as fixed by this Red Hat Ansible Automation Platform 2.6 security advisory; no technical details are provided in the content.
An information disclosure vulnerability in urllib3 caused by cross-origin redirects forwarding sensitive headers, affecting python3.12-urllib3 in Red Hat Ansible Automation Platform 2.6.
An information disclosure vulnerability in urllib3 where sensitive headers may be forwarded across origins during redirects, including proxied low-level redirects.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.