Firefox Developer Edition (ach) 148.0
Firefox Developer Edition (ach) 148.0, released February 9, 2026, fixes 54 CVEs in Firefox Developer Edition (ach). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Firefox Developer Edition (ach) is 151.0, which also fixes every one of these CVEs.
Superseded. The latest Firefox Developer Edition (ach) is 151.0, which also fixes every CVE on this page. Install that instead.
Priority of the 54 CVEs
Applies to
| Product | Version |
|---|---|
| Firefox Developer Edition (ach) | 148.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-2796 | JIT miscompilation in the JavaScript: WebAssembly component | 9.8 | 0.0095 | None reported |
| Urgent | CVE-2026-2805 | Invalid pointer in the DOM: Core & HTML component | 9.8 | 0.0066 | None reported |
| Urgent | CVE-2026-2799 | Use-after-free in the DOM: Core & HTML component | 9.8 | 0.0054 | None reported |
| Urgent | CVE-2026-2797 | Use-after-free in the JavaScript: GC component | 9.8 | 0.0053 | None reported |
| Urgent | CVE-2026-2806 | Uninitialized memory in the Graphics: Text component | 9.1 | 0.0045 | None reported |
| Urgent | CVE-2026-2800 | Spoofing issue in the WebAuthn component in Firefox for Android | 9.8 | 0.0035 | None reported |
| Urgent | CVE-2026-2795 | Use-after-free in the JavaScript: GC component | 9.8 | 0.0030 | None reported |
| Urgent | CVE-2026-2807 | Memory safety bugs fixed in Firefox 148 and Thunderbird 148 | 9.8 | 0.0029 | None reported |
| High | CVE-2026-2773 | Incorrect boundary conditions in the Web Audio component | 9.8 | 0.0092 | None reported |
| High | CVE-2026-2774 | Integer overflow in the Audio/Video component | 9.8 | 0.0085 | None reported |
| High | CVE-2026-2775 | Mitigation bypass in the DOM: HTML Parser component | 9.8 | 0.0084 | None reported |
| High | CVE-2026-2771 | Undefined behavior in the DOM: Core & HTML component | 9.8 | 0.0076 | None reported |
| High | CVE-2026-2763 | Use-after-free in the JavaScript Engine component | 9.8 | 0.0074 | None reported |
| High | CVE-2026-2764 | JIT miscompilation, use-after-free in the JavaScript Engine: JIT component | 9.8 | 0.0074 | None reported |
| High | CVE-2026-2765 | Use-after-free in the JavaScript Engine component | 9.8 | 0.0074 | None reported |
| High | CVE-2026-2766 | Use-after-free in the JavaScript Engine: JIT component | 9.8 | 0.0074 | None reported |
| High | CVE-2026-2770 | Use-after-free in the DOM: Bindings (WebIDL) component | 9.8 | 0.0074 | None reported |
| High | CVE-2026-2772 | Use-after-free in the Audio/Video: Playback component | 9.8 | 0.0074 | None reported |
| High | CVE-2026-2447 | Heap buffer overflow in libvpx | 8.8 | 0.0070 | None reported |
| High | CVE-2026-2779 | Incorrect boundary conditions in the Networking: JAR component | 9.8 | 0.0069 | None reported |
| High | CVE-2026-2769 | Use-after-free in the Storage: IndexedDB component | 8.8 | 0.0069 | None reported |
| High | CVE-2026-2788 | Incorrect boundary conditions in the Audio/Video: GMP component | 9.8 | 0.0068 | None reported |
| High | CVE-2026-2787 | Use-after-free in the DOM: Window and Location component | 9.8 | 0.0064 | None reported |
| High | CVE-2026-2762 | Integer overflow in the JavaScript: Standard Library component | 9.8 | 0.0063 | None reported |
| High | CVE-2026-2791 | Mitigation bypass in the Networking: Cache component | 9.8 | 0.0060 | None reported |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.