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firefox

Vendor: Mozilla • 3,269 CVEs

CVEs (3,269)

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1Mozilla
2Firefox
Thunderbird
Aug 19, 2026
Aug 18, 2026
N/A· v4
6.5 MEDIUM· v3
N/A· v2
JIT miscompilation in the JavaScript Engine: JIT 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 19, 2026
Aug 18, 2026
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Same-origin policy bypass 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...Show more
Same-origin policy bypass 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.Show less
1Mozilla
2Firefox
Thunderbird
Aug 19, 2026
Aug 18, 2026
N/A· v4
4.2 MEDIUM· v3
N/A· v2
Race condition, use-after-free 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...Show more
Race condition, use-after-free 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.Show less
1Mozilla
2Firefox
Thunderbird
Aug 19, 2026
Aug 18, 2026
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Information disclosure in the DOM: Push Subscriptions 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 19, 2026
Aug 18, 2026
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Information disclosure in the DOM: UI Events & Focus Handling 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
5.4 MEDIUM· v3
N/A· v2
Site isolation issue 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 19, 2026
Aug 18, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the Layout: Text and Fonts 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 20, 2026
Aug 18, 2026
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Site isolation issue in the Graphics: WebRender 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
5.4 MEDIUM· v3
N/A· v2
Same-origin policy bypass in the Audio/Video: Playback 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
Information disclosure in the Form Autofill 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 Shell Integration 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 19, 2026
Aug 18, 2026
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Integer overflow in the Graphics 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 19, 2026
Aug 18, 2026
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Same-origin policy bypass 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
Aug 19, 2026
Aug 18, 2026
N/A· v4
8.1 HIGH· v3
N/A· v2
Site isolation issue 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
Aug 20, 2026
Aug 18, 2026
N/A· v4
9.1 CRITICAL· v3
N/A· v2
Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 24, 2026
Aug 18, 2026
N/A· v4
8.1 HIGH· v3
N/A· v2
Site isolation issue in the WebExtensions 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 24, 2026
Aug 18, 2026
N/A· v4
9.1 CRITICAL· v3
N/A· v2
Mitigation bypass in the Storage: Cache API 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 19, 2026
Aug 18, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
1Mozilla
2Firefox
Thunderbird
Aug 24, 2026
Aug 18, 2026
N/A· v4
8.1 HIGH· v3
N/A· v2
Mitigation bypass in the Safe Browsing 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 19, 2026
Aug 18, 2026
N/A· v4
9.1 CRITICAL· v3
N/A· v2
Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.