Security Vulnerabilities
Privilege escalation in the DevTools 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
Use-after-free in the Graphics: Text 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
Privilege escalation in the Memory component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
8.8
EPSS Score
0.003
Published
2026-09-15
Privilege escalation in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
CVSS Score
8.8
EPSS Score
0.003
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
0.003
Published
2026-09-15
Privilege escalation in the Crash Reporting 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
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
9.0
EPSS Score
0.003
Published
2026-09-15
Use-after-free in the Widget: Win32 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
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.1
EPSS Score
0.004
Published
2026-09-15
Spoofing issue due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
CVSS Score
9.1
EPSS Score
0.006
Published
2026-09-15