Security update for MozillaFirefox

Announcement ID:	SUSE-SU-2026:21828-1
Release Date:	2026-05-22T13:02:50Z
Rating:	important
References:	bsc#1265212
Cross-References:	CVE-2026-8388 CVE-2026-8391 CVE-2026-8401 CVE-2026-8946 CVE-2026-8947 CVE-2026-8949 CVE-2026-8950 CVE-2026-8953 CVE-2026-8954 CVE-2026-8955 CVE-2026-8956 CVE-2026-8957 CVE-2026-8958 CVE-2026-8959 CVE-2026-8961 CVE-2026-8962 CVE-2026-8968 CVE-2026-8970 CVE-2026-8974 CVE-2026-8975
CVSS scores:	CVE-2026-8388 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVE-2026-8391 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVE-2026-8401 ( SUSE ): 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H CVE-2026-8401 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-8946 ( SUSE ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8946 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-8947 ( SUSE ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8947 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVE-2026-8949 ( SUSE ): 6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-8949 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-8950 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVE-2026-8950 ( NVD ): 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N CVE-2026-8953 ( SUSE ): 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L CVE-2026-8953 ( NVD ): 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVE-2026-8954 ( SUSE ): 7.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L CVE-2026-8954 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-8955 ( SUSE ): 6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-8955 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8956 ( SUSE ): 6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-8956 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-8957 ( SUSE ): 6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-8957 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8958 ( SUSE ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVE-2026-8958 ( NVD ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVE-2026-8959 ( SUSE ): 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L CVE-2026-8959 ( NVD ): 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVE-2026-8961 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVE-2026-8961 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVE-2026-8962 ( SUSE ): 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CVE-2026-8962 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N CVE-2026-8968 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CVE-2026-8968 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-8970 ( SUSE ): 6.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVE-2026-8970 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8974 ( SUSE ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8974 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8975 ( SUSE ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-8975 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0

An update that solves 20 vulnerabilities can now be installed.

Description:

This update for MozillaFirefox fixes the following issues

• Update to Firefox Extended Support Release 140.11.0 ESR MFSA 2026-48 (bsc#1265212).

MFSA 2026-48:

• CVE-2026-8388: Incorrect boundary conditions in the JavaScript Engine: JIT component.
• CVE-2026-8391: Other issue in the JavaScript Engine component.
• CVE-2026-8401: Sandbox escape in the Profile Backup component.
• CVE-2026-8946: Incorrect boundary conditions in the Audio/Video: Web Codecs component.
• CVE-2026-8947: Use-after-free in the DOM: Bindings (WebIDL) component.
• CVE-2026-8949: Integer overflow in the Widget: Win32 component.
• CVE-2026-8950: Same-origin policy bypass in the Networking: HTTP component.
• CVE-2026-8953: Sandbox escape due to use-after-free in the Disability Access APIs component.
• CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component.
• CVE-2026-8955: Privilege escalation in the DOM: Workers component.
• CVE-2026-8956: Integer overflow in the Networking: JAR component.
• CVE-2026-8957: Privilege escalation in the Enterprise Policies component.
• CVE-2026-8958: Information disclosure, sandbox escape in the Security: Process Sandboxing component.
• CVE-2026-8959: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
• CVE-2026-8961: Spoofing issue in the Form Autofill component.
• CVE-2026-8962: Mitigation bypass in the DOM: Security component.
• CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component.
• CVE-2026-8970: Privilege escalation in the Security component.
• CVE-2026-8974: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151.
• CVE-2026-8975: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151.

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 Server for SAP applications 16.0
  zypper in -t patch SUSE-SLES-16.0-795=1
• SUSE Linux Enterprise Server 16.0
  zypper in -t patch SUSE-SLES-16.0-795=1

Package List:

• SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
  • MozillaFirefox-debuginfo-140.11.0-160000.1.1
  • MozillaFirefox-translations-other-140.11.0-160000.1.1
  • MozillaFirefox-debugsource-140.11.0-160000.1.1
  • MozillaFirefox-140.11.0-160000.1.1
  • MozillaFirefox-translations-common-140.11.0-160000.1.1
• SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
  • MozillaFirefox-devel-140.11.0-160000.1.1
• SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
  • MozillaFirefox-debuginfo-140.11.0-160000.1.1
  • MozillaFirefox-translations-other-140.11.0-160000.1.1
  • MozillaFirefox-debugsource-140.11.0-160000.1.1
  • MozillaFirefox-140.11.0-160000.1.1
  • MozillaFirefox-translations-common-140.11.0-160000.1.1
• SUSE Linux Enterprise Server 16.0 (noarch)
  • MozillaFirefox-devel-140.11.0-160000.1.1

References:

• https://www.suse.com/security/cve/CVE-2026-8388.html
• https://www.suse.com/security/cve/CVE-2026-8391.html
• https://www.suse.com/security/cve/CVE-2026-8401.html
• https://www.suse.com/security/cve/CVE-2026-8946.html
• https://www.suse.com/security/cve/CVE-2026-8947.html
• https://www.suse.com/security/cve/CVE-2026-8949.html
• https://www.suse.com/security/cve/CVE-2026-8950.html
• https://www.suse.com/security/cve/CVE-2026-8953.html
• https://www.suse.com/security/cve/CVE-2026-8954.html
• https://www.suse.com/security/cve/CVE-2026-8955.html
• https://www.suse.com/security/cve/CVE-2026-8956.html
• https://www.suse.com/security/cve/CVE-2026-8957.html
• https://www.suse.com/security/cve/CVE-2026-8958.html
• https://www.suse.com/security/cve/CVE-2026-8959.html
• https://www.suse.com/security/cve/CVE-2026-8961.html
• https://www.suse.com/security/cve/CVE-2026-8962.html
• https://www.suse.com/security/cve/CVE-2026-8968.html
• https://www.suse.com/security/cve/CVE-2026-8970.html
• https://www.suse.com/security/cve/CVE-2026-8974.html
• https://www.suse.com/security/cve/CVE-2026-8975.html
• https://bugzilla.suse.com/show_bug.cgi?id=1265212