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SUSE: MozillaFirefox Important Security Update for 13 Issues 2026:0122-1

suse
Calendar Grey January 14, 2026
Dist Suse Esm H88
Important update for MozillaFirefox resolving 13 vulnerabilities. Immediate action recommended for SUSE users.
An update that solves 13 vulnerabilities can now be installed.

Summary

## This update for MozillaFirefox fixes the following issues: Update to Firefox Extended Support Release 140.7.0 ESR (bsc#1256340). * MFSA 2026-03 * CVE-2026-0877: Mitigation bypass in the DOM: Security component * CVE-2026-0878: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component * CVE-2026-0879: Sandbox escape due to incorrect boundary conditions in the Graphics component * CVE-2026-0880: Sandbox escape due to integer overflow in the Graphics component * CVE-2026-0882: Use-after-free in the IPC component * CVE-2025-14327: Spoofing issue in the Downloads Panel component * CVE-2026-0883: Information disclosure in the Networking component * CVE-2026-0884: Use-after-free in the JavaScript Engine component

Topics%20covered

Topics Covered

security advisory SuSE important information disclosure sandbox escape MozillaFirefox

References

* bsc#1256340

Cross-

* CVE-2025-14327

* CVE-2026-0877

* CVE-2026-0878

* CVE-2026-0879

* CVE-2026-0880

* CVE-2026-0882

* CVE-2026-0883

* CVE-2026-0884

* CVE-2026-0885

* CVE-2026-0886

* CVE-2026-0887

* CVE-2026-0890

* CVE-2026-0891

CVSS scores:

* CVE-2025-14327 ( SUSE ): 5.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

* CVE-2025-14327 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

* CVE-2025-14327 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

* CVE-2025-14327 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

* CVE-2026-0877 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

* CVE-2026-0878 ( NVD ): 8.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0122-1
Release Date: 2026-01-14T08:49:27Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important information disclosure sandbox escape MozillaFirefox

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