Detections
Analytics

Google: dev-python/urllib3: security update to 18244.521.74

medium Tenable Self-Hosted Container Security Plugin ID 451762

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - urllib3 is a user-friendly HTTP client library for Python. When using urllib3's proxy support with
 `ProxyManager`, the `Proxy-Authorization` header is only sent to the configured proxy, as expected.
 However, when sending HTTP requests *without* using urllib3's proxy support, it's possible to accidentally
 configure the `Proxy-Authorization` header even though it won't have any effect as the request is not
 using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn't treat the `Proxy-
 Authorization` HTTP header as one carrying authentication material and thus doesn't strip the header on
 cross-origin redirects. Because this is a highly unlikely scenario, we believe the severity of this
 vulnerability is low for almost all users. Out of an abundance of caution urllib3 will automatically strip
 the `Proxy-Authorization` header during cross-origin redirects to avoid the small chance that users are
 doing this on accident. Users should use urllib3's proxy support or disable automatic redirects to achieve
 safe processing of the `Proxy-Authorization` header, but we still decided to strip the header by default
 in order to further protect users who aren't using the correct approach. We believe the number of usages
 affected by this advisory is low. It requires all of the following to be true to be exploited: 1. Setting
 the `Proxy-Authorization` header without using urllib3's built-in proxy support. 2. Not disabling HTTP
 redirects. 3. Either not using an HTTPS origin server or for the proxy or target origin to redirect to a
 malicious origin. Users are advised to update to either version 1.26.19 or version 2.2.2. Users unable to
 upgrade may use the `Proxy-Authorization` header with urllib3's `ProxyManager`, disable HTTP redirects
 using `redirects=False` when sending requests, or not user the `Proxy-Authorization` header as
 mitigations. (CVE-2024-37891)

Solution

Update the dev-python/urllib3 library and its related packages to version 18244.521.74 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-113.oval.xml.tar.gz

Plugin Details

Severity: Medium

ID: 451762

Version: Revision 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.39

Vendor

Vendor Severity: MEDIUM

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N

CVSS Score Source: CVE-2024-37891

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 6/17/2024

Reference Information

CVE: CVE-2024-37891