ESB-2026.3837 — Vulnetix

ESB-2026.3837 PUBLISHED CVSS 8.800000190734863 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3837 Security update for MozillaThunderbird 17 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: MozillaThunderbird Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-5732 CVE-2026-5731 CVE-2026-5734 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20261379-1 Comment: CVSS (Max): 8.8 CVE-2026-5732 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVSS Source: SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H EPSS (Max): 0.1% (21st) CVE-2026-5731 2026-04-16 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for MozillaThunderbird Announcement ID: SUSE-SU-2026:1379-1 Release Date: 2026-04-16T08:42:00Z Rating: important References: o bsc#1261663 o CVE-2026-5731 Cross-References: o CVE-2026-5732 o CVE-2026-5734 o 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 o 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 o 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 o CVE-2026-5732 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/ CVSS scores: S:U/C:H/I:H/A:H o 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 o 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 o 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 o SUSE Linux Enterprise Desktop 15 SP7 o SUSE Linux Enterprise Real Time 15 SP7 Affected o SUSE Linux Enterprise Server 15 SP7 Products: o SUSE Linux Enterprise Server for SAP Applications 15 SP7 o SUSE Linux Enterprise Workstation Extension 15 SP7 o SUSE Package Hub 15 15-SP7 An update that solves three vulnerabilities can now be installed. Description: This update for MozillaThunderbird fixes the following issues: o Update to 149.0.2 and 140.9.1esr (bsc#1261663). o 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. o CVE-2026-5732: Incorrect boundary conditions, integer overflow in the Graphics: Text component. o 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: o SUSE Linux Enterprise Workstation Extension 15 SP7 zypper in -t patch SUSE-SLE-Product-WE-15-SP7-2026-1379=1 o SUSE Package Hub 15 15-SP7 zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-1379= 1 Package List: o SUSE Linux Enterprise Workstation Extension 15 SP7 (x86_64) MozillaThunderbird-translations-common-140.9.1-150200.8.266.1 MozillaThunderbird-translations-other-140.9.1-150200.8.266.1 MozillaThunderbird-debuginfo-140.9.1-150200.8.266.1 MozillaThunderbird-140.9.1-150200.8.266.1 MozillaThunderbird-debugsource-140.9.1-150200.8.266.1 o SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x) MozillaThunderbird-translations-common-140.9.1-150200.8.266.1 MozillaThunderbird-translations-other-140.9.1-150200.8.266.1 MozillaThunderbird-debuginfo-140.9.1-150200.8.266.1 MozillaThunderbird-140.9.1-150200.8.266.1 MozillaThunderbird-debugsource-140.9.1-150200.8.266.1 References: o https://www.suse.com/security/cve/CVE-2026-5731.html o https://www.suse.com/security/cve/CVE-2026-5732.html o https://www.suse.com/security/cve/CVE-2026-5734.html o https://bugzilla.suse.com/show_bug.cgi?id=1261663 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================

Risk Scores

CVSS v3.1

8.800000190734863

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions
SUSE	MozillaThunderbird

Timeline

Apr 17, 2026 CVE Published

References

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