| CVE-2026-8961 | 中6.5 | Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8960 | 高7.5 | Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151 and Thunderbird 151. | 19/05/2026 |
| CVE-2026-8959 | 緊急9.6 | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8958 | 高8.6 | Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8957 | 高8.8 | Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8956 | 緊急9.8 | Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8955 | 高8.8 | Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8954 | 高7.5 | Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8953 | 緊急9.6 | Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8952 | 高8.8 | Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 151 and Thunderbird 151. | 19/05/2026 |
| CVE-2026-8951 | 中6.5 | Spoofing issue in the Toolbar component in Firefox for Android. This vulnerability was fixed in Firefox 151. | 19/05/2026 |
| CVE-2026-8950 | 緊急9.3 | Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8949 | 高7.5 | Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8948 | 緊急9.1 | Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151. | 19/05/2026 |
| CVE-2026-8947 | 高7.3 | Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8946 | 高7.5 | Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 19/05/2026 |
| CVE-2026-8945 | 高7.5 | Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151. | 19/05/2026 |
| CVE-2026-8401 | 緊急9.8 | Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11. | 12/05/2026 |
| CVE-2026-8391 | 中5.3 | Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11. | 12/05/2026 |
| CVE-2026-8390 | 高7.3 | Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.0.3. | 12/05/2026 |