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firefox

Vendor: Mozilla • 3,269 CVEs

CVEs (3,269)

CVE
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1Mozilla
1Firefox
Jun 17, 2026
Mar 4, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Scanning certain QR codes that included text with a website URL could allow the URL to be opened without presenting the user with a confirmation alert first. This vulnerability was fixed in Firefox for iOS 136.
1Mozilla
1Firefox
Jun 17, 2026
Mar 4, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Websites redirecting to a non-HTTP scheme URL could allow a website address to be spoofed for a malicious page. This vulnerability was fixed in Firefox for iOS 136.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
8.2 HIGH· v3
N/A· v2
Memory safety bugs present in Firefox 135 and Thunderbird 135. 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 135 and Thunderbird 135. 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 136 and Thunderbird 136.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string. This vulnerability was fixed in Firefox 136 and Thunderbird 136.
1Mozilla
1Firefox
Jun 17, 2026
Mar 4, 2025
N/A· v4
9.1 CRITICAL· v3
N/A· v2
Under certain circumstances, a user opt-in setting that Focus should require authentication before use could have been be bypassed (distinct from CVE-2025-0245). This vulnerability was fixed in Firefox 136.
1Mozilla
1Firefox
Jun 17, 2026
Mar 4, 2025
N/A· v4
7.1 HIGH· v3
N/A· v2
A select option could partially obscure the confirmation prompt shown before launching external apps. This could be used to trick a user in to launching an external app unexpectedly. *This issue only affects Android ver...Show more
A select option could partially obscure the confirmation prompt shown before launching external apps. This could be used to trick a user in to launching an external app unexpectedly. *This issue only affects Android versions of Firefox.*. This vulnerability was fixed in Firefox 136.Show less
1Mozilla
1Firefox
Jun 17, 2026
Mar 4, 2025
N/A· v4
3.9 LOW· v3
N/A· v2
Android apps can load web pages using the Custom Tabs feature. This feature supports a transition animation that could have been used to trick a user into granting sensitive permissions by hiding what the user was actual...Show more
Android apps can load web pages using the Custom Tabs feature. This feature supports a transition animation that could have been used to trick a user into granting sensitive permissions by hiding what the user was actually clicking. This vulnerability was fixed in Firefox 136.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could hav...Show more
Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
7.5 HIGH· v3
N/A· v2
Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort som...Show more
Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. 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 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
7.3 HIGH· v3
N/A· v2
jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the...Show more
jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136,...Show more
It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
7.6 HIGH· v3
N/A· v2
On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability was fixed in Firefox 136, Fi...Show more
On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-bounds access. Only affected version 122 and later. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Th...Show more
An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-bounds access. Only affected version 122 and later. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
7.5 HIGH· v3
N/A· v2
It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR...Show more
It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Mar 4, 2025
N/A· v4
8.8 HIGH· v3
N/A· v2
On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-after-free in the Browser process. This could have led to a sandbox escape. This vulnerability was fixed in Firefox 1...Show more
On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-after-free in the Browser process. This could have led to a sandbox escape. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.Show less
1Mozilla
1Firefox
Jun 17, 2026
Feb 18, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Memory safety bugs present in Firefox 135. 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...Show more
Memory safety bugs present in Firefox 135. 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 135.0.1.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Feb 4, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Memory safety bugs present in Firefox 134 and Thunderbird 134. 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 134 and Thunderbird 134. 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 135 and Thunderbird 135.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Feb 4, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 1...Show more
The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Feb 4, 2025
N/A· v4
5.3 MEDIUM· v3
N/A· v2
The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 an...Show more
The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.Show less