| CVE-2026-2761 | NGHIÊM TRỌNG10.0 | Sandbox escape in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. | 24/02/2026 |
| CVE-2026-2760 | NGHIÊM TRỌNG10.0 | Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. | 24/02/2026 |
| CVE-2026-2759 | NGHIÊM TRỌNG9.8 | Incorrect boundary conditions in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. | 24/02/2026 |
| CVE-2026-2758 | NGHIÊM TRỌNG9.8 | Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. | 24/02/2026 |
| CVE-2026-2757 | NGHIÊM TRỌNG9.8 | Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. | 24/02/2026 |
| CVE-2026-2447 | CAO8.8 | Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2. | 16/02/2026 |
| CVE-2026-0818 | TRUNG BÌNH4.3 | When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additiona | 28/01/2026 |
| CVE-2026-0892 | NGHIÊM TRỌNG9.8 | Memory safety bugs present in Firefox 146 and Thunderbird 146. 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 147 and Thunderbird 147. | 13/01/2026 |
| CVE-2026-0891 | CAO8.1 | Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. 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 147, Firefox ESR | 13/01/2026 |
| CVE-2026-0890 | TRUNG BÌNH5.4 | Spoofing issue in the DOM: Copy & Paste and Drag & Drop component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |
| CVE-2026-0889 | CAO7.5 | Denial-of-service in the DOM: Service Workers component. This vulnerability was fixed in Firefox 147 and Thunderbird 147. | 13/01/2026 |
| CVE-2026-0888 | TRUNG BÌNH5.3 | Information disclosure in the XML component. This vulnerability was fixed in Firefox 147 and Thunderbird 147. | 13/01/2026 |
| CVE-2026-0887 | TRUNG BÌNH4.3 | Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |
| CVE-2026-0886 | TRUNG BÌNH5.3 | Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |
| CVE-2026-0885 | TRUNG BÌNH6.5 | Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |
| CVE-2026-0884 | NGHIÊM TRỌNG9.8 | Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |
| CVE-2026-0883 | TRUNG BÌNH5.3 | Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |
| CVE-2026-0882 | CAO8.8 | Use-after-free in the IPC component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |
| CVE-2026-0881 | NGHIÊM TRỌNG10.0 | Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147. | 13/01/2026 |
| CVE-2026-0880 | CAO8.8 | Sandbox escape due to integer overflow in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7. | 13/01/2026 |