Security update for curl

Announcement ID:	SUSE-SU-2026:1717-1
Release Date:	2026-05-06T12:14:02Z
Rating:	important
References:	bsc#1259362 bsc#1262631 bsc#1262632 bsc#1262635 bsc#1262636 bsc#1262638
Cross-References:	CVE-2026-1965 CVE-2026-4873 CVE-2026-5545 CVE-2026-6253 CVE-2026-6276 CVE-2026-6429
CVSS scores:	CVE-2026-1965 ( SUSE ): 6.9 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N CVE-2026-1965 ( SUSE ): 7.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N CVE-2026-1965 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVE-2026-4873 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVE-2026-4873 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVE-2026-5545 ( SUSE ): 8.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N CVE-2026-5545 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N CVE-2026-6253 ( SUSE ): 8.2 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVE-2026-6253 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-6276 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVE-2026-6276 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVE-2026-6429 ( SUSE ): 8.2 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVE-2026-6429 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Products:	openSUSE Leap 15.4 SUSE Linux Enterprise Desktop 15 SP4 SUSE Linux Enterprise Desktop 15 SP5 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP5 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Linux Enterprise Micro for Rancher 5.3 SUSE Linux Enterprise Micro for Rancher 5.4 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server 15 SP4 LTSS SUSE Linux Enterprise Server 15 SP5 SUSE Linux Enterprise Server 15 SP5 LTSS SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5 SUSE Manager Proxy 4.3 SUSE Manager Retail Branch Server 4.3 SUSE Manager Server 4.3

An update that solves six vulnerabilities can now be installed.

Description:

This update for curl fixes the following issues:

Security issues fixed:

• CVE-2026-4873: connection reuse ignores TLS requirement (bsc#1262631).
• CVE-2026-5545: wrong reuse of HTTP Negotiate connection (bsc#1262632).
• CVE-2026-6253: proxy credentials leak over redirect-to proxy (bsc#1262635).
• CVE-2026-6276: stale custom cookie host causes cookie leak (bsc#1262636).
• CVE-2026-6429: netrc credential leak with reused proxy connection (bsc#1262638).

Other updates and bugfixes:

• sws: prevent "connection monitor" to say disconnect twice (bsc#1259362).

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:

• SUSE Linux Enterprise High Performance Computing 15 SP5
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP5-2026-1717=1
• SUSE Linux Enterprise Server 15 SP5
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP5-2026-1717=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP5-2026-1717=1 SUSE-SLE-Product-SLES_SAP-15-SP5-2026-1717=1
• SUSE Linux Enterprise Desktop 15 SP5
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP5-2026-1717=1
• SUSE Linux Enterprise Micro for Rancher 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-1717=1
• SUSE Linux Enterprise Micro 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-1717=1
• SUSE Linux Enterprise Micro for Rancher 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-1717=1
• SUSE Linux Enterprise Micro 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-1717=1
• SUSE Linux Enterprise Micro 5.5
  zypper in -t patch SUSE-SLE-Micro-5.5-2026-1717=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-1717=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-1717=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-1717=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-1717=1
• SUSE Linux Enterprise Server 15 SP4 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-1717=1
• SUSE Linux Enterprise Server 15 SP5 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-1717=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-1717=1 SUSE-SLE-INSTALLER-15-SP4-2026-1717=1
• openSUSE Leap 15.4
  zypper in -t patch SUSE-2026-1717=1
• SUSE Linux Enterprise High Performance Computing 15 SP4
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP4-2026-1717=1
• SUSE Linux Enterprise Server 15 SP4
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP4-2026-1717=1
• SUSE Manager Server 4.3
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP4-2026-1717=1
• SUSE Linux Enterprise Desktop 15 SP4
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP4-2026-1717=1
• SUSE Manager Retail Branch Server 4.3
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP4-2026-1717=1
• SUSE Manager Proxy 4.3
  zypper in -t patch SUSE-SLE-INSTALLER-15-SP4-2026-1717=1

Package List:

• SUSE Linux Enterprise High Performance Computing 15 SP5 (aarch64 x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server 15 SP5 (aarch64 ppc64le s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Desktop 15 SP5 (x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64 x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64 x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64 x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64 x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
  • libcurl-devel-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
• openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64 i586)
  • libcurl-devel-8.14.1-150400.5.83.1
  • curl-mini-debugsource-8.14.1-150400.5.83.1
  • libcurl4-8.14.1-150400.5.83.1
  • curl-debugsource-8.14.1-150400.5.83.1
  • curl-debuginfo-8.14.1-150400.5.83.1
  • libcurl-mini4-debuginfo-8.14.1-150400.5.83.1
  • libcurl-mini4-8.14.1-150400.5.83.1
  • libcurl4-debuginfo-8.14.1-150400.5.83.1
  • curl-8.14.1-150400.5.83.1
• openSUSE Leap 15.4 (noarch)
  • curl-zsh-completion-8.14.1-150400.5.83.1
  • curl-fish-completion-8.14.1-150400.5.83.1
  • libcurl-devel-doc-8.14.1-150400.5.83.1
• openSUSE Leap 15.4 (x86_64)
  • libcurl4-32bit-debuginfo-8.14.1-150400.5.83.1
  • libcurl4-32bit-8.14.1-150400.5.83.1
  • libcurl-devel-32bit-8.14.1-150400.5.83.1
• openSUSE Leap 15.4 (aarch64_ilp32)
  • libcurl4-64bit-8.14.1-150400.5.83.1
  • libcurl-devel-64bit-8.14.1-150400.5.83.1
  • libcurl4-64bit-debuginfo-8.14.1-150400.5.83.1
• SUSE Linux Enterprise High Performance Computing 15 SP4 (aarch64 x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Server 15 SP4 (aarch64 ppc64le s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Manager Server 4.3 (ppc64le s390x x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Linux Enterprise Desktop 15 SP4 (x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Manager Retail Branch Server 4.3 (x86_64)
  • libcurl4-8.14.1-150400.5.83.1
• SUSE Manager Proxy 4.3 (x86_64)
  • libcurl4-8.14.1-150400.5.83.1

References:

• https://www.suse.com/security/cve/CVE-2026-1965.html
• https://www.suse.com/security/cve/CVE-2026-4873.html
• https://www.suse.com/security/cve/CVE-2026-5545.html
• https://www.suse.com/security/cve/CVE-2026-6253.html
• https://www.suse.com/security/cve/CVE-2026-6276.html
• https://www.suse.com/security/cve/CVE-2026-6429.html
• https://bugzilla.suse.com/show_bug.cgi?id=1259362
• https://bugzilla.suse.com/show_bug.cgi?id=1262631
• https://bugzilla.suse.com/show_bug.cgi?id=1262632
• https://bugzilla.suse.com/show_bug.cgi?id=1262635
• https://bugzilla.suse.com/show_bug.cgi?id=1262636
• https://bugzilla.suse.com/show_bug.cgi?id=1262638