CVE-2018-18074

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-10-09 · updated 2026-06-17
Weakness: CWE-522

Description

The Requests package before 2.20.0 for Python sends an HTTP Authorization header to an http URI upon receiving a same-hostname https-to-http redirect, which makes it easier for remote attackers to discover credentials by sniffing the network.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
openSUSE Leap: 15.1
psf requests: before 2.20.0 — fixed in 2.20.0
RedHat Enterprise Linux Desktop: 7.0
RedHat Enterprise Linux Server: 7.0
RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: psf requests 2.20.0. Check the vendor advisory for mitigations.

References

http://docs.python-requests.org/en/master/community/updates/#release-and-version-history
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00024.html
https://access.redhat.com/errata/RHSA-2019:2035
https://bugs.debian.org/910766
https://github.com/requests/requests/commit/c45d7c49ea75133e52ab22a8e9e13173938e36ff
https://github.com/requests/requests/issues/4716
https://github.com/requests/requests/pull/4718
https://usn.ubuntu.com/3790-1/
https://usn.ubuntu.com/3790-2/
https://www.oracle.com/security-alerts/cpujul2022.html
http://docs.python-requests.org/en/master/community/updates/#release-and-version-history
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00024.html

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