Windows apps · Mozilla
Firefox Developer Edition (en-US) security updates
The latest version of Firefox Developer Edition (en-US) is 156.0, released September 2, 2026. Patch Radar has 26 security fixes for Firefox Developer Edition (en-US), closing 748 CVEs, 1 of which is being exploited. The newest security fix is Firefox Developer Edition (en-US) 156.0, released September 2, 2026. 76 CVEs have no fix yet.
1 exploited CVEs76 with no fix yet
Latest version
156.0
Released Sep 2, 2026
Security fixes
26
On record in Patch Radar
CVEs
748
Closed by those fixes
Exploited
1
Vendor report or CISA KEV
CVEs with no fix yet
| Priority | CVE | Title | Status |
|---|---|---|---|
| Urgent | CVE-2026-100760 | Sandbox escape in the Security: Process Sandboxing component | no-fix |
| Urgent | CVE-2026-100763 | Incorrect boundary conditions in the Graphics: WebGPU component | no-fix |
| Urgent | CVE-2026-100787 | Sandbox escape in the XUL component | no-fix |
| Urgent | CVE-2026-100800 | Sandbox escape due to use-after-free in the Disability Access APIs component | no-fix |
| Urgent | CVE-2026-100804 | Sandbox escape due to use-after-free in the Preferences: Backend component | no-fix |
| Urgent | CVE-2026-100810 | Other issue in the DevTools component | no-fix |
| Urgent | CVE-2026-100828 | Mitigation bypass in the Bookmarks & History component | no-fix |
| Urgent | CVE-2026-100829 | Mitigation bypass in the DOM: Security component | no-fix |
| Urgent | CVE-2026-106016 | Mitigation bypass in the File Handling component | no-fix |
| High | CVE-2026-100756 | Incorrect boundary conditions in the Audio/Video: Playback component | no-fix |
| High | CVE-2026-100757 | Use-after-free in the Widget component | no-fix |
| High | CVE-2026-100758 | Sandbox escape in the DOM: Navigation component | no-fix |
| High | CVE-2026-100759 | Uninitialized memory in the Storage: Quota Manager component | no-fix |
| High | CVE-2026-100761 | Privilege escalation due to use-after-free in the Graphics: WebGPU component | no-fix |
| High | CVE-2026-100762 | Sandbox escape due to use-after-free in the DOM: Content Processes component | no-fix |
| High | CVE-2026-100764 | Privilege escalation due to incorrect boundary conditions in the Graphics: WebGPU component | no-fix |
| High | CVE-2026-100765 | Use-after-free in the JavaScript: WebAssembly component | no-fix |
| High | CVE-2026-100766 | Information disclosure in the Networking: JAR component | no-fix |
| High | CVE-2026-100767 | Use-after-free in the Networking: Cache component | no-fix |
| High | CVE-2026-100768 | Use-after-free in the Graphics: WebGPU component | no-fix |
| High | CVE-2026-100769 | Use-after-free in the JavaScript: WebAssembly component | no-fix |
| High | CVE-2026-100770 | Sandbox escape due to use-after-free in the DOM: Content Processes component | no-fix |
| High | CVE-2026-100771 | Undefined behavior in the DOM: Streams component | no-fix |
| High | CVE-2026-100772 | Use-after-free in the DOM: Core & HTML component | no-fix |
| High | CVE-2026-100773 | Use-after-free in the Storage: IndexedDB component | no-fix |
| High | CVE-2026-100774 | Use-after-free in the DOM: Core & HTML component | no-fix |
| High | CVE-2026-100775 | Sandbox escape in the Graphics component | no-fix |
| High | CVE-2026-100776 | Use-after-free in the JavaScript: WebAssembly component | no-fix |
| High | CVE-2026-100777 | Use-after-free in the Graphics: Canvas2D component | no-fix |
| High | CVE-2026-100778 | Sandbox escape due to use-after-free in the DOM: Core & HTML component | no-fix |
| High | CVE-2026-100779 | Use-after-free in the XSLT component | no-fix |
| High | CVE-2026-100780 | Use-after-free in the DOM: Core & HTML component | no-fix |
| High | CVE-2026-100781 | Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component | no-fix |
| High | CVE-2026-100782 | Privilege escalation due to incorrect boundary conditions in the Graphics component | no-fix |
| High | CVE-2026-100783 | Uninitialized memory in the Audio/Video component | no-fix |
| High | CVE-2026-100784 | Use-after-free in the Layout: Text and Fonts component | no-fix |
| High | CVE-2026-100785 | Use-after-free in the DOM: Core & HTML component | no-fix |
| High | CVE-2026-100786 | Sandbox escape due to use-after-free in the Graphics component | no-fix |
| High | CVE-2026-100788 | Invalid pointer in the JavaScript: WebAssembly component | no-fix |
| High | CVE-2026-100789 | Use-after-free in the Graphics: Canvas2D component | no-fix |
| High | CVE-2026-100790 | Use-after-free in the XSLT component | no-fix |
| High | CVE-2026-100791 | Use-after-free in the DOM: Core & HTML component | no-fix |
| High | CVE-2026-100792 | JIT miscompilation in the JavaScript: WebAssembly component | no-fix |
| High | CVE-2026-100794 | Sandbox escape due to incorrect boundary conditions in the Internationalization component | no-fix |
| High | CVE-2026-100796 | Use-after-free in the JavaScript: WebAssembly component | no-fix |
| High | CVE-2026-100797 | Privilege escalation due to use-after-free in the Graphics: WebRender component | no-fix |
| High | CVE-2026-100798 | Cryptography misuse in Storage: Quota Manager component | no-fix |
| High | CVE-2026-100801 | Privilege escalation in the DLL Services component | no-fix |
| High | CVE-2026-100803 | Same-origin policy bypass in the WebExtensions component | no-fix |
| High | CVE-2026-100805 | Race condition, use-after-free in the Audio/Video component | no-fix |
| High | CVE-2026-100807 | Privilege escalation in the DOM: Service Workers component | no-fix |
| High | CVE-2026-100808 | Mitigation bypass in the DOM: Service Workers component | no-fix |
| High | CVE-2026-100809 | Same-origin policy bypass in the DevTools component | no-fix |
| High | CVE-2026-100811 | Sandbox escape due to use-after-free in the DOM: Core & HTML component | no-fix |
| High | CVE-2026-100813 | Invalid pointer in the JavaScript Engine: JIT component | no-fix |
| High | CVE-2026-100814 | Incorrect boundary conditions in the JavaScript Engine: JIT component | no-fix |
| High | CVE-2026-100815 | Use-after-free in the CSS Parsing and Computation component | no-fix |
| High | CVE-2026-100816 | Site isolation issue in the DOM: Networking component | no-fix |
| High | CVE-2026-100818 | Sandbox escape due to use-after-free in the Widget: Gtk component | no-fix |
| High | CVE-2026-100819 | Sandbox escape due to incorrect boundary conditions in the XPCOM component | no-fix |
| High | CVE-2026-100820 | Privilege escalation in the Address Bar component | no-fix |
| High | CVE-2026-100821 | Site isolation issue in the Panning and Zooming component | no-fix |
| High | CVE-2026-100824 | Privilege escalation in the Places component | no-fix |
| High | CVE-2026-100825 | Use-after-free in the JavaScript Engine: JIT component | no-fix |
| High | CVE-2026-100830 | Mitigation bypass in the DOM: Navigation component | no-fix |
| High | CVE-2026-100831 | Use-after-free in the DOM: UI Events & Focus Handling component | no-fix |
| High | CVE-2026-96869 | Information disclosure in the Networking component | no-fix |
| Routine | CVE-2026-100793 | JIT miscompilation in the JavaScript Engine component | no-fix |
| Routine | CVE-2026-100795 | Denial-of-service in the Networking component | no-fix |
| Routine | CVE-2026-100799 | Uninitialized memory in the Graphics: WebGPU component | no-fix |
| Routine | CVE-2026-100802 | Uninitialized memory in the Graphics: WebGPU component | no-fix |
| Routine | CVE-2026-100806 | Uninitialized memory in the Graphics: WebGPU component | no-fix |
| Routine | CVE-2026-100812 | Denial-of-service in the Graphics component | no-fix |
| Routine | CVE-2026-100817 | Other issue in the JavaScript: WebAssembly component | no-fix |
| Routine | CVE-2026-100822 | Spoofing issue in the Networking: HTTP component | no-fix |
| Routine | CVE-2026-100826 | Denial-of-service in the Storage: StorageManager component | no-fix |
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