CVE-2018-20060

python-urllib3: Cross-host redirect does not remove Authorization header allow for credential exposure

Published Dec 11, 2018 CVSS 3.0 · 9.8 Critical EPSS 4.5% KEV · Not listed
Description
urllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2686-1 python-urllib3 security update
Debian DLA Debian DLA DLA-3610-1 python-urllib3 security update
EUVD EUVD EUVD-2018-0144 urllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext.
Github GHSA Github GHSA GHSA-www2-v7xj-xrc6 Exposure of Sensitive Information to an Unauthorized Actor in urllib3
Ubuntu USN Ubuntu USN USN-3990-1 urllib3 vulnerabilities
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Dec 27, 2024, 4:02 PM
Reserved
Dec 11, 2018, 12:00 AM
Status
Modified
Published
Dec 11, 2018, 5:29 PM
Modified
Jun 17, 2026, 1:52 AM
Severity
Moderate
Public date
Mar 26, 2018, 12:00 AM