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