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CVE-2018-20060

33
FAUCET Score

CVE-2018-20060 is a critical vulnerability in urllib3 versions prior to 1.23, affecting products like Fedora and Python urllib3. It allows the Authorization HTTP header, potentially containing credentials, to be exposed to unintended hosts or transmitted in cleartext when following cross-origin redirects. With a CVSS score of 9.8, this vulnerability has a high impact on confidentiality, integrity, and availability, requiring no user interaction or privileges to exploit. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.23CPE matchmatch criteria
cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*
28CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
29CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
30CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.49%
Probability of exploitation in next 30 days
EPSS Percentile
90.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0449 is in the 84th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (25)

pippatch availablevia ghsa
Product: urllib3Fixed in: 1.23
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Tower 3.5 for RHEL 7Fixed in: ansible-tower-35/ansible-tower:3.5.6-1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Tower 3.6 for RHEL 7Fixed in: ansible-tower-36/ansible-tower:3.6.4-1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-urllib3-0:1.10.2-7.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-pip-0:9.0.3-7.el7_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-virtualenv-0:15.1.0-4.el7_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-pip-0:9.0.3-7.el7_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-virtualenv-0:15.1.0-4.el7_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python27:2.7-8020020200117110429.90f98d4f
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python-pip-0:9.0.3-16.el8
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 3.10Fixed in: python-urllib3
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 3.9Fixed in: python-urllib3
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 14 (Rocky)Fixed in: python-urllib3
redhatend of lifevia redhat_api
Product: Red Hat Storage 3Fixed in: python-urllib3
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 10 (Newton)Fixed in: python-urllib3
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 13 (Queens)Fixed in: python-urllib3
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 8 (Liberty)Fixed in: python-urllib3
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 9 (Mitaka)Fixed in: python-urllib3
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: python27-python-pip
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: python27-python-virtualenv
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-python36-python-pip
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-python36-python-virtualenv
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: python-urllib3
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: python-urllib3

Vendor Advisories (2)

pipGHSA-www2-v7xj-xrc6critical

Exposure of Sensitive Information to an Unauthorized Actor in urllib3

Dec 12, 2018
redhatCVE-2018-20060Moderate

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

Mar 26, 2018

References

security.netapp.com / advisory/ntap-20241227-0010
lists.opensuse.org / opensuse-security-announce/2019-09/msg00039.html
access.redhat.com / errata/RHSA-2019:2272
bugzilla.redhat.com / show_bug.cgi
Issue TrackingMitigationPatchThird Party Advisory
github.com / urllib3/urllib3/blob/master/CHANGES.rst
Release NotesThird Party Advisory
github.com / urllib3/urllib3/issues/1316
Third Party Advisory
github.com / urllib3/urllib3/pull/1346
Third Party Advisory
lists.debian.org / debian-lts-announce/2021/06/msg00015.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5SJERZEJDSUYQP7BNBXMBHRHGY26HRZD
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/BXLAXHM3Z6DUCXZ7ZXZ2EAYJXWDCZFCT
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/XWP36YW3KSVLXDBY3QJKDYEPCIMN3VQZ
usn.ubuntu.com / 3990-1