Mozilla: >> Firefox >> 83.0 Security Vulnerabilities
Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
CVSS Score
8.6
EPSS Score
0.0
Published
2026-03-24
Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
CVSS Score
10.0
EPSS Score
0.0
Published
2026-03-24
Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
CVSS Score
10.0
EPSS Score
0.0
Published
2026-03-24
Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
CVSS Score
8.6
EPSS Score
0.0
Published
2026-03-24
Use-after-free in the CSS Parsing and Computation component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
CVSS Score
9.8
EPSS Score
0.0
Published
2026-03-24
Heap buffer overflow in the Audio/Video: Playback component in Firefox for Android. This vulnerability affects Firefox < 148.0.2.
CVSS Score
8.8
EPSS Score
0.0
Published
2026-03-10
Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability affects Firefox < 148.0.2.
CVSS Score
6.5
EPSS Score
0.0
Published
2026-03-10
Memory safety bugs present in Firefox 148.0.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148.0.2.
CVSS Score
8.8
EPSS Score
0.0
Published
2026-03-10
Invalid pointer in the DOM: Core & HTML component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.8
EPSS Score
0.0
Published
2026-02-24
Uninitialized memory in the Graphics: Text component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-02-24