- 7/2026
- Critical
Mozilla has released an updated Firefox version 147, Firefox ESR versions 115.32, and 140.7 to fix multiple vulnerabilities.
The addressed vulnerabilities could allow the attacker to bypass security restrictions, corrupt memory, perform denial of service attacks, obtain sensitive information, execute arbitrary code, and gain access to the affected system.
Sample of the addressed vulnerabilities:
1. Mozilla Sandbox Escape in the Messaging System Component Vulnerability (CVE-2026-0881):
- CVSS: 10
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Consequences: Bypass Security
2. Mozilla Use-After-Free in the IPC Component Vulnerability (CVE-2026-0882):
- CVSS: 8.8
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: Required
- Consequences: Gain Access
Vulnerabilities
- CVE-2026-0877
- CVE-2026-0878
- CVE-2026-0879
- CVE-2026-0880
- CVE-2026-0881
- CVE-2026-0882
- CVE-2026-0883
- CVE-2026-0884
- CVE-2026-0885
- CVE-2026-0886
- CVE-2026-0887
- CVE-2026-0888
- CVE-2026-0889
- CVE-2026-0890
- CVE-2026-0891
- CVE-2026-0892
Mitigations
The enterprise should deploy this patch as soon as the testing phase is completed.