SUSE-SU-2026:1741-1: important: Security update for MozillaThunderbird

SLE-UPDATES null at suse.de
Thu May 7 16:31:41 UTC 2026 


# Security update for MozillaThunderbird

Announcement ID: SUSE-SU-2026:1741-1  
Release Date: 2026-05-07T07:01:07Z  
Rating: important  
References:

  * bsc#1262230
  * bsc#1263110

  
Cross-References:

  * CVE-2026-6746
  * CVE-2026-6747
  * CVE-2026-6748
  * CVE-2026-6749
  * CVE-2026-6750
  * CVE-2026-6751
  * CVE-2026-6752
  * CVE-2026-6753
  * CVE-2026-6754
  * CVE-2026-6757
  * CVE-2026-6759
  * CVE-2026-6761
  * CVE-2026-6762
  * CVE-2026-6763
  * CVE-2026-6764
  * CVE-2026-6765
  * CVE-2026-6766
  * CVE-2026-6767
  * CVE-2026-6769
  * CVE-2026-6770
  * CVE-2026-6771
  * CVE-2026-6772
  * CVE-2026-6776
  * CVE-2026-6785
  * CVE-2026-6786
  * CVE-2026-7320
  * CVE-2026-7321
  * CVE-2026-7322
  * CVE-2026-7323

  
CVSS scores:

  * CVE-2026-6746 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-6747 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-6748 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-6749 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-6750 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-6751 ( NVD ):  7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-6752 ( NVD ):  7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-6753 ( NVD ):  7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-6754 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-6757 ( NVD ):  6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2026-6759 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-6761 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-6762 ( NVD ):  6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2026-6763 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-6764 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-6765 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-6766 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-6767 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-6769 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-6770 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-6771 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-6772 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-6776 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-6785 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-6786 ( NVD ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-7320 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-7321 ( NVD ):  9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
  * CVE-2026-7322 ( NVD ):  7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-7323 ( NVD ):  7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

  
Affected Products:

  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7
  * SUSE Linux Enterprise Workstation Extension 15 SP7
  * SUSE Package Hub 15 15-SP7

  
  
An update that solves 29 vulnerabilities can now be installed.

## Description:

This update for MozillaThunderbird fixes the following issues

Updated to Mozilla Thunderbird 140.10.1:

MFSA 2026-34 (bsc#1262230):

  * CVE-2026-6746: Use-after-free in the DOM: Core & HTML component.
  * CVE-2026-6747: Use-after-free in the WebRTC component.
  * CVE-2026-6748: Uninitialized memory in the Audio/Video: Web Codecs
    component.
  * CVE-2026-6749: Information disclosure due to uninitialized memory in the
    Graphics: Canvas2D component.
  * CVE-2026-6750: Privilege escalation in the Graphics: WebRender component.
  * CVE-2026-6751: Uninitialized memory in the Audio/Video: Web Codecs
    component.
  * CVE-2026-6752: Incorrect boundary conditions in the WebRTC component.
  * CVE-2026-6753: Incorrect boundary conditions in the WebRTC component.
  * CVE-2026-6754: Use-after-free in the JavaScript Engine component.
  * CVE-2026-6757: Invalid pointer in the JavaScript: WebAssembly component.
  * CVE-2026-6759: Use-after-free in the Widget: Cocoa component.
  * CVE-2026-6761: Privilege escalation in the Networking component.
  * CVE-2026-6762: Spoofing issue in the DOM: Core & HTML component.
  * CVE-2026-6763: Mitigation bypass in the File Handling component.
  * CVE-2026-6764: Incorrect boundary conditions in the DOM: Device Interfaces
    component.
  * CVE-2026-6765: Information disclosure in the Form Autofill component.
  * CVE-2026-6766: Incorrect boundary conditions in the Libraries component in
    NSS.
  * CVE-2026-6767: Other issue in the Libraries component in NSS.
  * CVE-2026-6769: Privilege escalation in the Debugger component.
  * CVE-2026-6770: Other issue in the Storage: IndexedDB component.
  * CVE-2026-6771: Mitigation bypass in the DOM: Security component.
  * CVE-2026-6772: Incorrect boundary conditions in the Libraries component in
    NSS.
  * CVE-2026-6776: Incorrect boundary conditions in the WebRTC: Networking
    component.
  * CVE-2026-6785: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR
    140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150.
  * CVE-2026-6786: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird
    ESR 140.10, Firefox 150 and Thunderbird 150.

MFSA 2026-39 (bsc#1263110):

  * CVE-2026-7320: Information disclosure due to incorrect boundary conditions
    in the Audio/Video component.
  * CVE-2026-7321: Sandbox escape due to incorrect boundary conditions in the
    WebRTC: Networking component.
  * CVE-2026-7322: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and
    Thunderbird 150.0.1.
  * CVE-2026-7323: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and
    Thunderbird 150.0.1.

Other updates and bugfixes:

  * Fixed: Newly translated strings were not available in Thunderbird.

## 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 Package Hub 15 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-1741=1

  * SUSE Linux Enterprise Workstation Extension 15 SP7  
    zypper in -t patch SUSE-SLE-Product-WE-15-SP7-2026-1741=1

## Package List:

  * SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x)
    * MozillaThunderbird-debuginfo-140.10.1-150200.8.271.1
    * MozillaThunderbird-debugsource-140.10.1-150200.8.271.1
    * MozillaThunderbird-translations-other-140.10.1-150200.8.271.1
    * MozillaThunderbird-140.10.1-150200.8.271.1
    * MozillaThunderbird-translations-common-140.10.1-150200.8.271.1
  * SUSE Linux Enterprise Workstation Extension 15 SP7 (x86_64)
    * MozillaThunderbird-debuginfo-140.10.1-150200.8.271.1
    * MozillaThunderbird-debugsource-140.10.1-150200.8.271.1
    * MozillaThunderbird-translations-other-140.10.1-150200.8.271.1
    * MozillaThunderbird-140.10.1-150200.8.271.1
    * MozillaThunderbird-translations-common-140.10.1-150200.8.271.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-6746.html
  * https://www.suse.com/security/cve/CVE-2026-6747.html
  * https://www.suse.com/security/cve/CVE-2026-6748.html
  * https://www.suse.com/security/cve/CVE-2026-6749.html
  * https://www.suse.com/security/cve/CVE-2026-6750.html
  * https://www.suse.com/security/cve/CVE-2026-6751.html
  * https://www.suse.com/security/cve/CVE-2026-6752.html
  * https://www.suse.com/security/cve/CVE-2026-6753.html
  * https://www.suse.com/security/cve/CVE-2026-6754.html
  * https://www.suse.com/security/cve/CVE-2026-6757.html
  * https://www.suse.com/security/cve/CVE-2026-6759.html
  * https://www.suse.com/security/cve/CVE-2026-6761.html
  * https://www.suse.com/security/cve/CVE-2026-6762.html
  * https://www.suse.com/security/cve/CVE-2026-6763.html
  * https://www.suse.com/security/cve/CVE-2026-6764.html
  * https://www.suse.com/security/cve/CVE-2026-6765.html
  * https://www.suse.com/security/cve/CVE-2026-6766.html
  * https://www.suse.com/security/cve/CVE-2026-6767.html
  * https://www.suse.com/security/cve/CVE-2026-6769.html
  * https://www.suse.com/security/cve/CVE-2026-6770.html
  * https://www.suse.com/security/cve/CVE-2026-6771.html
  * https://www.suse.com/security/cve/CVE-2026-6772.html
  * https://www.suse.com/security/cve/CVE-2026-6776.html
  * https://www.suse.com/security/cve/CVE-2026-6785.html
  * https://www.suse.com/security/cve/CVE-2026-6786.html
  * https://www.suse.com/security/cve/CVE-2026-7320.html
  * https://www.suse.com/security/cve/CVE-2026-7321.html
  * https://www.suse.com/security/cve/CVE-2026-7322.html
  * https://www.suse.com/security/cve/CVE-2026-7323.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1262230
  * https://bugzilla.suse.com/show_bug.cgi?id=1263110

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