Security update for python-urllib3

Announcement ID: SUSE-SU-2026:0443-1
Release Date: 2026-02-11T09:47:06Z
Rating: moderate
References:
Cross-References:
CVSS scores:
  • CVE-2025-66418 ( SUSE ): 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-66418 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • CVE-2025-66418 ( NVD ): 8.9 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • CVE-2025-66418 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2025-66471 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  • CVE-2025-66471 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • CVE-2025-66471 ( NVD ): 8.9 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • CVE-2025-66471 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2026-21441 ( SUSE ): 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  • CVE-2026-21441 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
  • CVE-2026-21441 ( NVD ): 8.9 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • CVE-2026-21441 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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

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).

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: