Security Vulnerabilities
Spoofing issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-09-15
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-09-15
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
9.6
EPSS Score
0.003
Published
2026-09-15
Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
9.1
EPSS Score
0.003
Published
2026-09-15
Use-after-free in the Graphics component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-15
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
9.3
EPSS Score
0.001
Published
2026-09-15
Use-after-free in the Internationalization component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-15
Incorrect boundary conditions in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.8
EPSS Score
0.006
Published
2026-09-15
Privilege escalation in the Session Restore component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-15
Denial-of-service in the Audio/Video component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
6.5
EPSS Score
0.004
Published
2026-09-15