Mozilla Thunderbird vulnerabilities

CVE-2023-4577 [MEDIUM] CVE-2023-4577: When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbag When `UpdateRegExpStatics` attempted to access `initialStringHeap` it could already have been garbage collected prior to entering the function, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.

CVE-2023-23603 [MEDIUM] CWE-770 CVE-2023-23603: Regular expressions used to filter out forbidden properties and values from style directives in call Regular expressions used to filter out forbidden properties and values from style directives in calls to `console.log` weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.

CVE-2023-4573 [MEDIUM] CWE-416 CVE-2023-4573: When receiving rendering data over IPC `mStream` could have been destroyed when initialized, which c When receiving rendering data over IPC `mStream` could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.

CVE-2022-45404 [MEDIUM] CWE-451 CVE-2022-45404: Through a series of popup and <code>window.print()</code> calls, an attacker can cause a window to g Through a series of popup and window.print() calls, an attacker can cause a window to go fullscreen without the user seeing the notification prompt, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

CVE-2023-23602 [MEDIUM] CWE-754 CVE-2023-23602: A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Pol A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src header to be ignored. This could lead to connections to restricted origins from inside WebWorkers. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.

CVE-2024-10464 [MEDIUM] CWE-125 CVE-2024-10464: Repeated writes to history interface attributes could have been used to cause a Denial of Service co Repeated writes to history interface attributes could have been used to cause a Denial of Service condition in the browser. This was addressed by introducing rate-limiting to this API. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.

CVE-2024-0747 [MEDIUM] CWE-693 CVE-2024-0747: When a parent page loaded a child in an iframe with `unsafe-inline`, the parent Content Security Pol When a parent page loaded a child in an iframe with `unsafe-inline`, the parent Content Security Policy could have overridden the child Content Security Policy. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

CVE-2023-29545 [MEDIUM] CVE-2023-29545: Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing en Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment variable names would have resolved those in the context of the current user. *This bug only affects Firefox and Thunderbird on Windows. Other versions of Firefox and Thunderbird are unaffected.* This vulnerability affects Firefox < 112, Firefox ESR

CVE-2024-7526 [MEDIUM] CWE-908 CVE-2024-7526: ANGLE failed to initialize parameters which lead to reading from uninitialized memory. This could be ANGLE failed to initialize parameters which lead to reading from uninitialized memory. This could be leveraged to leak sensitive data from memory. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.

CVE-2024-7518 [MEDIUM] CWE-1021 CVE-2024-7518: Select options could obscure the fullscreen notification dialog. This could be used by a malicious s Select options could obscure the fullscreen notification dialog. This could be used by a malicious site to perform a spoofing attack. This vulnerability affects Firefox < 129, Firefox ESR < 128.1, and Thunderbird < 128.1.

CVE-2021-23993 [MEDIUM] CWE-347 CVE-2021-23993: An attacker may perform a DoS attack to prevent a user from sending encrypted email to a corresponde An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, ca

CVE-2022-38472 [MEDIUM] CWE-346 CVE-2022-38472: An attacker could have abused XSLT error handling to associate attacker-controlled content with anot An attacker could have abused XSLT error handling to associate attacker-controlled content with another origin which was displayed in the address bar. This could have been used to fool the user into submitting data intended for the spoofed origin. This vulnerability affects Thunderbird < 102.2, Thunderbird < 91.13, Firefox ESR < 91.13, Firefox ESR <

CVE-2025-9181 [MEDIUM] CWE-457 CVE-2025-9181: Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142 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.

CVE-2025-8033 [MEDIUM] CWE-476 CVE-2025-8033: The JavaScript engine did not handle closed generators correctly and it was possible to resume them The JavaScript engine did not handle closed generators correctly and it was possible to resume them leading to a nullptr deref. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

CVE-2026-4728 [MEDIUM] CWE-290 CVE-2026-4728: Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

CVE-2026-12325 [MEDIUM] Mozilla Foundation Security Advisory 2026-60: CVE-2026-12325 Mozilla Foundation Security Advisory 2026-60 CVE: CVE-2026-12325 Product: Thunderbird Impact: high Fixed in: Thunderbird 152

CVE-2025-11716 [MEDIUM] CWE-284 CVE-2025-11716: Links in a sandboxed iframe could open an external app on Android without the required "allow-" perm Links in a sandboxed iframe could open an external app on Android without the required "allow-" permission. This vulnerability was fixed in Firefox 144 and Thunderbird 144.

CVE-2026-16403 [MEDIUM] CWE-451 CVE-2026-16403: Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 153 and Thunder Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVE-2019-9793 [MEDIUM] CWE-119 CVE-2019-9793: A mechanism was discovered that removes some bounds checking for string, array, or typed array acces A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have

CVE-2015-4521 [HIGH] CVE-2015-4521: The ConvertDialogOptions function in Mozilla Firefox before 41 The ConvertDialogOptions function in Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 might allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via unknown vectors.