SUSE-SU-2026:1322-1: important: Security update for MozillaFirefox

SLE-UPDATES null at suse.de
Tue Apr 14 20:30:24 UTC 2026 


# 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

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