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ESB-2026.3869 PUBLISHED CVSS 5.300000190734863 MEDIUM

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3869 Security update for python-urllib3 17 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: python-urllib3 Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2025-66471 CVE-2026-21441 CVE-2025-66418 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20261412-1 Comment: CVSS (Max): 5.3 CVE-2025-66471 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) CVSS Source: SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L EPSS (Max): 0.0% (9th) CVE-2025-66418 2026-04-16 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for python-urllib3 Announcement ID: SUSE-SU-2026:1412-1 Release Date: 2026-04-16T13:06:27Z Rating: moderate o bsc#1254866 o bsc#1254867 References: o bsc#1256331 o bsc#1259829 o jsc#PED-15380 o CVE-2025-66418 Cross-References: o CVE-2025-66471 o CVE-2026-21441 o 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 o 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 o 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 o 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 o 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 o 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 o CVE-2025-66471 ( NVD ): 8.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/ CVSS scores: 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 o 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 o 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 o 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 o 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 o 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 o Public Cloud Module 12 o SUSE Linux Enterprise High Performance Computing 12 SP2 o SUSE Linux Enterprise High Performance Computing 12 SP3 o SUSE Linux Enterprise High Performance Computing 12 SP4 o SUSE Linux Enterprise High Performance Computing 12 SP5 o SUSE Linux Enterprise Server 12 o SUSE Linux Enterprise Server 12 SP1 o SUSE Linux Enterprise Server 12 SP2 Affected o SUSE Linux Enterprise Server 12 SP3 Products: o SUSE Linux Enterprise Server 12 SP4 o SUSE Linux Enterprise Server 12 SP5 o SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security o SUSE Linux Enterprise Server for SAP Applications 12 o SUSE Linux Enterprise Server for SAP Applications 12 SP1 o SUSE Linux Enterprise Server for SAP Applications 12 SP2 o SUSE Linux Enterprise Server for SAP Applications 12 SP3 o SUSE Linux Enterprise Server for SAP Applications 12 SP4 o SUSE Linux Enterprise Server for SAP Applications 12 SP5 An update that solves three vulnerabilities, contains one feature and has one security fix can now be installed. Description: This update for python-urllib3 fixes the following issues: Security issues: o CVE-2025-66418: resource exhaustion via unbounded number of links in the decompression chain (bsc#1254866). o CVE-2025-66471: excessive resource consumption via decompression of highly compressed data in Streaming API (bsc#1254867). o CVE-2026-21441: excessive resource consumption during decompression of data in HTTP redirect responses (bsc#1256331). Non-security issues: o Disabled response decompression with brotli due to missing brotli feature (jsc#PED-15380). 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: o Public Cloud Module 12 zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2026-1412=1 o SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1412= 1 Package List: o Public Cloud Module 12 (noarch) python-urllib3-1.25.10-3.48.4 python3-urllib3-1.25.10-3.48.4 o SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (noarch) python-urllib3-1.25.10-3.48.4 python3-urllib3-1.25.10-3.48.4 References: o https://www.suse.com/security/cve/CVE-2025-66418.html o https://www.suse.com/security/cve/CVE-2025-66471.html o https://www.suse.com/security/cve/CVE-2026-21441.html o https://bugzilla.suse.com/show_bug.cgi?id=1254866 o https://bugzilla.suse.com/show_bug.cgi?id=1254867 o https://bugzilla.suse.com/show_bug.cgi?id=1256331 o https://bugzilla.suse.com/show_bug.cgi?id=1259829 o https://jira.suse.com/browse/PED-15380 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================

Risk Scores

CVSS v3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Products

VendorProductVersions
SUSEpython-urllib3

Timeline

References

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