Detections
Analytics

Fedora 43 : python-urllib3 (2026-724d1b1044)

high Nessus Plugin ID 282547

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Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-724d1b1044 advisory.

 ### 2.6.3 (2026-01-07)

 - Fixed a high-severity security issue where decompression-bomb safeguards of the streaming API were bypassed when HTTP redirects were followed.
 [`GHSA-38jv-5279-wg99`](https://github.com/urllib3/urllib3/security/advisories/GHSA-38jv-5279-wg99), [`CVE-2026-21441`](https://www.cve.org/CVERecord?id=CVE-2026-21441)
 - Started treating `Retry-After` times greater than 6 hours as 6 hours by default.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected python-urllib3 package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-724d1b1044

Plugin Details

Severity: High

ID: 282547

File Name: fedora_2026-724d1b1044.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/10/2026

Updated: 1/10/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-21441

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.9

Threat Score: 6.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:python-urllib3, cpe:/o:fedoraproject:fedora:43

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 1/8/2026

Vulnerability Publication Date: 1/7/2026

Reference Information

CVE: CVE-2026-21441