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Vendor: Mozilla • 3,269 CVEs

CVEs (3,269)

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1Mozilla
2Firefox
Thunderbird
Sep 2, 2026
Sep 1, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
1Mozilla
2Firefox
Thunderbird
Sep 2, 2026
Sep 1, 2026
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
1Mozilla
2Firefox
Thunderbird
Sep 2, 2026
Sep 1, 2026
N/A· v4
9.6 CRITICAL· v3
N/A· v2
Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunde...Show more
Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.Show less
1Mozilla
2Firefox
Thunderbird
Sep 2, 2026
Sep 1, 2026
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
1Mozilla
2Firefox
Thunderbird
Sep 2, 2026
Sep 1, 2026
N/A· v4
9.6 CRITICAL· v3
N/A· v2
Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thun...Show more
Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.Show less
1Mozilla
2Firefox
Thunderbird
Sep 2, 2026
Sep 1, 2026
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
1Mozilla
2Firefox
Thunderbird
Sep 1, 2026
Aug 18, 2026
N/A· v4
10.0 CRITICAL· v3
N/A· v2
Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 140.15, and Thunderbird 153.2.
1Mozilla
2Firefox
Thunderbird
Sep 1, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with eno...Show more
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Show less
1Mozilla
2Firefox
Thunderbird
Sep 1, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Internally found bugs present in Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited...Show more
Internally found bugs present in Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.Show less
1Mozilla
2Firefox
Thunderbird
Sep 1, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Internally found bugs present in Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these...Show more
Internally found bugs present in Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Show less
1Mozilla
2Firefox
Thunderbird
Sep 1, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with eno...Show more
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Show less
1Mozilla
2Firefox
Thunderbird
Aug 25, 2026
Aug 18, 2026
N/A· v4
9.1 CRITICAL· v3
N/A· v2
Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 25, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 25, 2026
Aug 18, 2026
N/A· v4
6.8 MEDIUM· v3
N/A· v2
Race condition in the JavaScript Engine component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 19, 2026
Aug 18, 2026
N/A· v4
8.1 HIGH· v3
N/A· v2
Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 25, 2026
Aug 18, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 25, 2026
Aug 18, 2026
N/A· v4
8.1 HIGH· v3
N/A· v2
Site isolation issue in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 20, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 25, 2026
Aug 18, 2026
N/A· v4
8.1 HIGH· v3
N/A· v2
Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 25, 2026
Aug 18, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.