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Vendor: Mozilla • 3,269 CVEs

CVEs (3,269)

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1Mozilla
1Firefox
Jun 17, 2026
Jun 24, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.
1Mozilla
1Firefox
Jun 17, 2026
Jun 11, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
An integer overflow was present in `OrderedHashTable` used by the JavaScript engine. This vulnerability was fixed in Firefox 139.0.4.
1Mozilla
1Firefox
Jun 17, 2026
Jun 11, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
May 27, 2025
N/A· v4
7.3 HIGH· v3
N/A· v2
Memory safety bugs present in Firefox 138 and Thunderbird 138. 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 138 and Thunderbird 138. 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 139 and Thunderbird 139.Show less
1Mozilla
1Firefox
Jun 17, 2026
May 27, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability was fixed in Firefox 139 and Thunderbird 139.
1Mozilla
1Firefox
Jun 17, 2026
May 27, 2025
N/A· v4
7.5 HIGH· v3
N/A· v2
In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability was fixed in Firefox 139 and Thunderbird 139.
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
May 27, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vul...Show more
Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.11 and Thunderbird 128.11.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
May 27, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could h...Show more
Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. 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 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.Show less
1Mozilla
1Firefox
Jun 17, 2026
May 27, 2025
N/A· v4
5.4 MEDIUM· v3
N/A· v2
A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunder...Show more
A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.Show less
1Mozilla
1Firefox
Jun 17, 2026
May 27, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thu...Show more
Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.Show less
1Mozilla
1Firefox
Jun 17, 2026
May 27, 2025
N/A· v4
4.8 MEDIUM· v3
N/A· v2
Due to insufficient escaping of the ampersand character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. *This bug o...Show more
Due to insufficient escaping of the ampersand character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. *This bug only affects Firefox for Windows. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.Show less
1Mozilla
1Firefox
Jun 17, 2026
May 27, 2025
N/A· v4
4.8 MEDIUM· v3
N/A· v2
Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerab...Show more
Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.Show less
1Mozilla
1Firefox
Jun 17, 2026
May 27, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thun...Show more
Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.Show less
1Mozilla
1Firefox
Jun 17, 2026
May 21, 2025
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Opening maliciously-crafted URLs in Firefox from other apps such as Safari could have allowed attackers to spoof website addresses if the URLs utilized non-HTTP schemes used internally by the Firefox iOS client. This vul...Show more
Opening maliciously-crafted URLs in Firefox from other apps such as Safari could have allowed attackers to spoof website addresses if the URLs utilized non-HTTP schemes used internally by the Firefox iOS client. This vulnerability was fixed in Firefox for iOS 139.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
May 17, 2025
N/A· v4
8.8 HIGH· v3
N/A· v2
An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbi...Show more
An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
May 17, 2025
N/A· v4
9.8 CRITICAL· v3
N/A· v2
An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thun...Show more
An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Apr 29, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulne...Show more
Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Apr 29, 2025
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Memory safety bugs present in Firefox 137 and Thunderbird 137. 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 137 and Thunderbird 137. 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 138 and Thunderbird 138.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Apr 29, 2025
N/A· v4
8.1 HIGH· v3
N/A· v2
Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. 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 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. 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 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.Show less
1Mozilla
2Firefox
Thunderbird
Jun 17, 2026
Apr 29, 2025
N/A· v4
5.3 MEDIUM· v3
N/A· v2
A vulnerability existed in Thunderbird for Android where potentially sensitive library locations were logged via Logcat. This vulnerability was fixed in Firefox 138 and Thunderbird 138.