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firefox

Vendor: Mozilla • 3,181 CVEs

CVEs (3,181)

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1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Sep 16, 2025
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Mitigation bypass in the Web Compatibility: Tooling component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Sep 16, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Sep 16, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Same-origin policy bypass in the Layout component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Sep 16, 2025
N/A· v4
7.3 HIGH· v3
N/A· v2
Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Sep 16, 2025
N/A· v4
7.1 HIGH· v3
N/A· v2
Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Aug 19, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Memory safety bugs present in Firefox 141 and Thunderbird 141. 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....Show more
Memory safety bugs present in Firefox 141 and Thunderbird 141. 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 was fixed in Firefox 142 and Thunderbird 142.Show less
1Mozilla
1Firefox
Jun 17, 2026
Aug 19, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Spoofing issue in the Address Bar component of Firefox Focus for Android. This vulnerability was fixed in Firefox 142.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Aug 19, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corrup...Show more
Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. 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 was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Aug 19, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could...Show more
Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. 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 was fixed in Firefox 142, Firefox ESR 140.2, Thunderbird 142, and Thunderbird 140.2.Show less
1Mozilla
1Firefox
Jun 17, 2026
Aug 19, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 142 and Firefox ESR 140.2.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Aug 19, 2025
N/A· v4
7.5 HIGH· v3
N/A· v2
Denial-of-service due to out-of-memory in the Graphics: WebRender component. This vulnerability was fixed in Firefox 142, Firefox ESR 140.2, Thunderbird 142, and Thunderbird 140.2.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Aug 19, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Aug 19, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird...Show more
Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Aug 19, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vu...Show more
An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.Show less
1Mozilla
1Firefox
Jun 17, 2026
Aug 19, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
A crafted URL using a blob: URI could have hidden the true origin of the page, resulting in a potential spoofing attack. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.*...Show more
A crafted URL using a blob: URI could have hidden the true origin of the page, resulting in a potential spoofing attack. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 141.Show less
1Mozilla
1Firefox
Jun 17, 2026
Aug 19, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start downloads. This vulnerability was fixed in Firefox 141.
1Mozilla
1Firefox
Jun 17, 2026
Aug 19, 2025
N/A· v4
5.3 MEDIUM· v3
N/A· v2
In the address bar, Firefox for Android truncated the display of URLs from the end instead of prioritizing the origin. This vulnerability was fixed in Firefox 141.
1Mozilla
2Firefox
Firefox Focus
Jun 17, 2026
Aug 19, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An attacker within Bluetooth range could have used this to trick the user into using their passkey to log...Show more
Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An attacker within Bluetooth range could have used this to trick the user into using their passkey to log the attacker's computer into the target account. This vulnerability was fixed in Firefox for iOS 142 and Focus for iOS 142.Show less
1Mozilla
1Firefox
Jun 17, 2026
Aug 19, 2025
N/A· v4
6.1 MEDIUM· v3
N/A· v2
Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks. This vulnerability was fix...Show more
Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks. This vulnerability was fixed in Firefox for iOS 142.Show less
1Mozilla
1Firefox
Jun 17, 2026
Aug 19, 2025
N/A· v4
7.5 HIGH· v3
N/A· v2
Malicious scripts could bypass the popup blocker to spam new tabs, potentially resulting in denial of service attacks. This vulnerability was fixed in Firefox for iOS 142.