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openSUSE Python-urllib3 Moderate Vulnerabilities Resource Handling Flaws

opensuse
Calendar Grey February 11, 2026
Scroller Opensuse
This update addresses multiple issues in python-urllib3 to improve resource handling and security on openSUSE systems.
An update that solves three vulnerabilities can now be installed.

Description

This update for python-urllib3_1 fixes the following issues:

* CVE-2025-66471: excessive resource consumption via decompression of highly

compressed data in Streaming API (bsc#1254867).

* CVE-2025-66418: resource exhaustion via unbounded number of links in the

decompression chain (bsc#1254866).

* CVE-2026-21441: excessive resource consumption during decompression of data

in HTTP redirect responses (bsc#1256331).

Topics%20covered

Topics Covered

security advisory moderate resource consumption OpenSUSE python-urllib3 suse-su-2026:0443-1

Patch

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like

YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

* openSUSE Leap 15.3

zypper in -t patch SUSE-2026-443=1

* SUSE Linux Enterprise Micro for Rancher 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-443=1

* SUSE Linux Enterprise Micro 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-443=1

* SUSE Linux Enterprise Micro for Rancher 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-443=1

* SUSE Linux Enterprise Micro 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-443=1

* SUSE Linux Enterprise Micro 5.5

zypper in -t patch SUSE-SLE-Micro-5.5-2026-443=1

* Basesystem Module 15-SP7

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-443=1

* SUSE Linux Enterprise Micro 5.2

zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-443=1

* SUSE Linux Enterprise Micro for Rancher 5.2

zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-443=1

Package List

* openSUSE Leap 15.3 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* SUSE Linux Enterprise Micro for Rancher 5.3 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* SUSE Linux Enterprise Micro 5.3 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* SUSE Linux Enterprise Micro for Rancher 5.4 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* SUSE Linux Enterprise Micro 5.4 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* SUSE Linux Enterprise Micro 5.5 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* Basesystem Module 15-SP7 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* SUSE Linux Enterprise Micro 5.2 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

* SUSE Linux Enterprise Micro for Rancher 5.2 (noarch)

* python3-urllib3-1.25.10-150300.4.21.1

References

* bsc#1254866

* bsc#1254867

* bsc#1256331

## References:

* https://www.suse.com/security/cve/CVE-2025-66418.html

* https://www.suse.com/security/cve/CVE-2025-66471.html

* https://www.suse.com/security/cve/CVE-2026-21441.html

* https://bugzilla.suse.com/show_bug.cgi?id=1254866

* https://bugzilla.suse.com/show_bug.cgi?id=1254867

* https://bugzilla.suse.com/show_bug.cgi?id=1256331

Announcement ID: SUSE-SU-2026:0443-1
Release Date: 2026-02-11T09:47:06Z
Affected Products: * Basesystem Module 15-SP7 * openSUSE Leap 15.3 * SUSE Linux Enterprise Desktop 15 SP7 * SUSE Linux Enterprise Micro 5.2 * SUSE Linux Enterprise Micro 5.3 * SUSE Linux Enterprise Micro 5.4 * SUSE Linux Enterprise Micro 5.5 * SUSE Linux Enterprise Micro for Rancher 5.2 * SUSE Linux Enterprise Micro for Rancher 5.3 * SUSE Linux Enterprise Micro for Rancher 5.4 * SUSE Linux Enterprise Real Time 15 SP7 * SUSE Linux Enterprise Server 15 SP7 * SUSE Linux Enterprise Server for SAP Applications 15 SP7

Topics%20covered

Topics Covered

security advisory moderate resource consumption OpenSUSE python-urllib3 suse-su-2026:0443-1

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