NVD や CVE、ほか複数の脅威フィードを束ね、RCE など高リスクな事象を深く追える一覧です。CVSS と EPSS を組み合わせ、Exploit 参照や PoC の有無から悪用しやすさを追跡します。ベンダー修正や緩和策の文脈とあわせて優先度を決め、対応サイクルを短く保ちつつ重要資産を守る支援をします。
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| CVE | 説明 | CVSS 最大値 | EPSS（%） | 公開 | 更新 |
|---|---|---|---|---|---|
| CVE-2026-4698 | JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 9.8 | 0.76% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4697 | Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 7.5 | 0.69% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4696 | Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 9.8 | 0.49% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4695 | Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 7.5 | 0.69% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4694 | Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 7.5 | 0.77% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4693 | Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 7.5 | 0.69% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4692 | Sandbox escape in the Responsive Design Mode component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 10.0 | 0.49% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4691 | Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 9.8 | 0.49% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4690 | Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 8.6 | 0.77% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4689 | Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 10.0 | 0.68% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4688 | Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 10.0 | 0.53% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4687 | Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 8.6 | 0.54% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4686 | Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 7.5 | 0.70% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4685 | Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 7.5 | 0.69% | 2026-03-24 | 2026-06-29 |
| CVE-2026-4684 | Race condition, use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. | 7.5 | 0.35% | 2026-03-24 | 2026-06-29 |
| CVE-2026-3847 | Memory safety bugs present in Firefox 148.0.2. 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 was fixed in Firefox 148.0.2. | 8.8 | 0.31% | 2026-03-10 | 2026-06-17 |
| CVE-2026-3846 | Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 148.0.2. | 6.5 | 0.11% | 2026-03-10 | 2026-06-17 |
| CVE-2026-3845 | Heap buffer overflow in the Audio/Video: Playback component in Firefox for Android. This vulnerability was fixed in Firefox 148.0.2. | 8.8 | 0.44% | 2026-03-10 | 2026-06-17 |
| CVE-2026-2919 | Malicious scripts could display attacker-controlled web content under spoofed domains in Focus for iOS by stalling a _self navigation to an invalid port and triggering an iframe redirect, causing the UI to display a trusted domain without user interaction. This vulnerability was fixed in Focus for iOS 148.2. | 4.3 | 0.18% | 2026-03-09 | 2026-06-17 |
| CVE-2026-2807 | Memory safety bugs present in Firefox 147 and Thunderbird 147. 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 148 and Thunderbird 148. | 9.8 | 0.24% | 2026-02-24 | 2026-06-29 |