CVE-2025-8027

On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability affects Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbi...

CVE-2025-8035

Memory safety bugs present in Firefox ESR 128.12, Thunderbird ESR 128.12, Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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...

CVE-2025-8029

Thunderbird executed javascript: URLs when used in object and embed tags. This vulnerability affects Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1...

CVE-2025-6429

Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an embed tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability affects Firefox 140, Firefox ESR...

CVE-2025-6431

When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. This bug only affects...

CVE-2025-49710

An integer overflow was present in OrderedHashTable used by the JavaScript engine. This vulnerability was fixed in Firefox 139.0.4...

CVE-2025-5268

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 affects Firefox...

CVE-2025-5271

Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability affects Firefox 139 and Thunderbird 139...

CVE-2025-5264

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 affects Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbir...

CVE-2025-5270

In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability affects Firefox 139 and Thunderbird 139...

CVE-2025-4918

An attacker was able to perform an out-of-bounds read or write on a JavaScript Promise object. This vulnerability affects Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2...

CVE-2025-4086

A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog. This bug only affects Thunderbird for Android. Other versions of Thunderbird are unaffected.. This vulnerability was fixed in Firefox 138...

CVE-2025-4091

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 affects Firefox 13...

CVE-2025-3028

JavaScript code running while transforming a document with the XSLTProcessor could lead to a use-after-free. This vulnerability affects Firefox 137, Firefox ESR 115.22, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9...

CVE-2025-3029

A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9...

CVE-2025-3034

Memory safety bugs present in Firefox 136 and Thunderbird 136. 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 affects Firefox 137 and Thunderbird 137...

CVE-2025-3033

After selecting a malicious Windows .url shortcut from the local filesystem, an unexpected file could be uploaded. This bug only affects Firefox on Windows. Other operating systems are unaffected.. This vulnerability was fixed in Firefox 137 and Thunderbird 137...

CVE-2025-1934

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 affects Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8...

CVE-2025-1942

When String.toUpperCase caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string This vulnerability affects Firefox 136 and Thunderbird 136...

CVE-2025-1938

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 affects Firefox 13...