Security update for MozillaFirefox

Announcement ID:	SUSE-SU-2026:1322-1
Release Date:	2026-04-14T12:42:13Z
Rating:	important
References:	bsc#1261663 jsc#PED-15778
Cross-References:	CVE-2026-5731 CVE-2026-5732 CVE-2026-5734
CVSS scores:	CVE-2026-5731 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-5731 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-5732 ( SUSE ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-5732 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-5734 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-5734 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-5734 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:	Desktop Applications Module 15-SP7 SUSE Linux Enterprise Desktop 15 SP7 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 Real Time 15 SP7 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 15 SP6 SUSE Linux Enterprise Server 15 SP6 LTSS SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves three vulnerabilities and contains one feature can now be installed.

Description:

This update for MozillaFirefox fixes the following issues:

• Update to 149.0.2 and 140.9.1esr (bsc#1261663).
• CVE-2026-5731: Memory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2.
• CVE-2026-5732: Incorrect boundary conditions, integer overflow in the Graphics: Text component.
• CVE-2026-5734: Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2.

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 ESPOS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-1322=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-1322=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-1322=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-1322=1
• SUSE Linux Enterprise Server 15 SP4 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-1322=1
• SUSE Linux Enterprise Server 15 SP5 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-1322=1
• SUSE Linux Enterprise Server 15 SP6 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-1322=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-1322=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-1322=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-1322=1
• Desktop Applications Module 15-SP7
  zypper in -t patch SUSE-SLE-Module-Desktop-Applications-15-SP7-2026-1322=1

Package List:

• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64 x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64 x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64 x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64 x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1
• Desktop Applications Module 15-SP7 (aarch64 ppc64le s390x x86_64)
  • MozillaFirefox-debugsource-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-common-140.9.1-150200.152.228.1
  • MozillaFirefox-debuginfo-140.9.1-150200.152.228.1
  • MozillaFirefox-translations-other-140.9.1-150200.152.228.1
  • MozillaFirefox-140.9.1-150200.152.228.1
• Desktop Applications Module 15-SP7 (noarch)
  • MozillaFirefox-devel-140.9.1-150200.152.228.1

References:

• https://www.suse.com/security/cve/CVE-2026-5731.html
• https://www.suse.com/security/cve/CVE-2026-5732.html
• https://www.suse.com/security/cve/CVE-2026-5734.html
• https://bugzilla.suse.com/show_bug.cgi?id=1261663
• https://jira.suse.com/browse/PED-15778