Total
490 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2023-6204 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 6.5 MEDIUM |
| On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5. | |||||
| CVE-2023-5732 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 6.5 MEDIUM |
| An attacker could have created a malicious link using bidirectional characters to spoof the location in the address bar when visited. This vulnerability affects Firefox < 117, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5730 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 9.8 CRITICAL |
| Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. 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 < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5728 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 7.5 HIGH |
| During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5727 | 2 Microsoft, Mozilla | 4 Windows, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 6.5 MEDIUM |
| The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle files, which can run commands on a user's computer. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5726 | 2 Apple, Mozilla | 4 Macos, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 4.3 MEDIUM |
| A website could have obscured the full screen notification by using the file open dialog. This could have led to user confusion and possible spoofing attacks. *Note: This issue only affected macOS operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5725 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 4.3 MEDIUM |
| A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5724 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 7.5 HIGH |
| Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led to a crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5721 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 4.3 MEDIUM |
| It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an insufficient activation-delay. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1. | |||||
| CVE-2023-5176 | 2 Debian, Mozilla | 4 Debian Linux, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 9.8 CRITICAL |
| Memory safety bugs present in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2. 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 < 118, Firefox ESR < 115.3, and Thunderbird < 115.3. | |||||
| CVE-2023-5174 | 2 Microsoft, Mozilla | 4 Windows, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 9.8 CRITICAL |
| If Windows failed to duplicate a handle during process creation, the sandbox code may have inadvertently freed a pointer twice, resulting in a use-after-free and a potentially exploitable crash. *This bug only affects Firefox on Windows when run in non-standard configurations (such as using `runas`). Other operating systems are unaffected.* This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3. | |||||
| CVE-2023-5171 | 3 Debian, Fedoraproject, Mozilla | 5 Debian Linux, Fedora, Firefox and 2 more | 2026-06-17 | N/A | 6.5 MEDIUM |
| During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3. | |||||
| CVE-2023-5169 | 3 Debian, Fedoraproject, Mozilla | 5 Debian Linux, Fedora, Firefox and 2 more | 2026-06-17 | N/A | 6.5 MEDIUM |
| A compromised content process could have provided malicious data in a `PathRecording` resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3. | |||||
| CVE-2023-5168 | 2 Microsoft, Mozilla | 4 Windows, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 9.8 CRITICAL |
| A compromised content process could have provided malicious data to `FilterNodeD2D1` resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3. | |||||
| CVE-2023-4585 | 1 Mozilla | 3 Firefox, Firefox Esr, Thunderbird | 2026-06-17 | N/A | 8.8 HIGH |
| Memory safety bugs present in Firefox 116, Firefox ESR 115.1, and Thunderbird 115.1. 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 < 117, Firefox ESR < 115.2, and Thunderbird < 115.2. | |||||
| CVE-2023-4584 | 1 Mozilla | 3 Firefox, Firefox Esr, Thunderbird | 2026-06-17 | N/A | 8.8 HIGH |
| Memory safety bugs present in Firefox 116, Firefox ESR 102.14, Firefox ESR 115.1, Thunderbird 102.14, and Thunderbird 115.1. 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 < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2. | |||||
| CVE-2023-4583 | 1 Mozilla | 3 Firefox, Firefox Esr, Thunderbird | 2026-06-17 | N/A | 7.5 HIGH |
| When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2. | |||||
| CVE-2023-4582 | 2 Apple, Mozilla | 4 Macos, Firefox, Firefox Esr and 1 more | 2026-06-17 | N/A | 8.8 HIGH |
| Due to large allocation checks in Angle for glsl shaders being too lenient a buffer overflow could have occurred when allocating too much private shader memory on mac OS. *This bug only affects Firefox on macOS. Other operating systems are unaffected.* This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2. | |||||
| CVE-2023-4581 | 1 Mozilla | 3 Firefox, Firefox Esr, Thunderbird | 2026-06-17 | N/A | 4.3 MEDIUM |
| Excel `.xll` add-in files did not have a blocklist entry in Firefox's executable blocklist which allowed them to be downloaded without any warning of their potential harm. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2. | |||||
| CVE-2023-4580 | 1 Mozilla | 3 Firefox, Firefox Esr, Thunderbird | 2026-06-17 | N/A | 6.5 MEDIUM |
| Push notifications stored on disk in private browsing mode were not being encrypted potentially allowing the leak of sensitive information. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2. | |||||