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firefox

Vendor: Mozilla • 3,269 CVEs

CVEs (3,269)

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CVSS
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the Request Handling 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
7.5 HIGH· v3
N/A· v2
Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the Networking: Cookies 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
Sep 1, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 153.2, and Thunderbird 153.2.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the Downloads API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Sep 1, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153...Show more
Privilege escalation due to use-after-free in the Graphics: Canvas2D 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.Show less
1Mozilla
2Firefox
Thunderbird
Aug 24, 2026
Aug 18, 2026
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Information disclosure in the Graphics component. 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.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, T...Show more
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. 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
Aug 24, 2026
Aug 18, 2026
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Information disclosure in the Graphics: Text component. 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.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Use-after-free in the DOM: Core & HTML 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 21, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Use-after-free in the Graphics: ImageLib component. 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.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the Remote Settings Client component. 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 1...Show more
Privilege escalation in the Remote Settings Client component. 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
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the Graphics: CanvasWebGL 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 21, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Use-after-free in the Graphics: Text component. 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.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the DOM: Navigation component. 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.
1Mozilla
2Firefox
Thunderbird
Aug 19, 2026
Aug 18, 2026
N/A· v4
9.1 CRITICAL· v3
N/A· v2
Mitigation bypass in the JavaScript: GC 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
8.8 HIGH· v3
N/A· v2
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 21, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Use-after-free in the JavaScript: WebAssembly 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 21, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation in the DOM: Networking component. 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.