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SUSE MozillaFirefox Critical Security Patch 2026-0260-2

suse
Calendar Grey January 23, 2026
Scroller Suse
SUSE updates MozillaFirefox, addressing 13 important issues with effective patch methods.
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 security update SuSE important information disclosure 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-2026:0260-1
Release Date: 2026-01-22T16:12:21Z
Rating: important

Topics%20covered

Topics Covered

security advisory security update SuSE important information disclosure MozillaFirefox

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