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Known vulnerabilities in Mozilla Firefox

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CVE Summary Score Published
CVE-2026-109710 Use-after-free in the Graphics: Text component 5.4 Medium Oct 13, 2026
CVE-2026-106016 Mitigation bypass in the File Handling component 9.8 Critical Oct 6, 2026
CVE-2026-100831 Use-after-free in the DOM: UI Events & Focus Handling component 8.8 High Sep 29, 2026
CVE-2026-100832 Use-after-free in the Graphics: Canvas2D component 8.8 High Sep 29, 2026
CVE-2026-100829 Mitigation bypass in the DOM: Security component 9.6 Critical Sep 29, 2026
CVE-2026-100830 Mitigation bypass in the DOM: Navigation component 8.1 High Sep 29, 2026
CVE-2026-100826 Denial-of-service in the Storage: StorageManager component 6.5 Medium Sep 29, 2026
CVE-2026-100828 Mitigation bypass in the Bookmarks & History component 9.6 Critical Sep 29, 2026
CVE-2026-100824 Privilege escalation in the Places component 8.8 High Sep 29, 2026
CVE-2026-100825 Use-after-free in the JavaScript Engine: JIT component 8.8 High Sep 29, 2026
CVE-2026-100823 Spoofing issue in the Downloads component in Firefox for Android 5.4 Medium Sep 29, 2026
CVE-2026-100821 Site isolation issue in the Panning and Zooming component 4.7 Medium Sep 29, 2026
CVE-2026-100822 Spoofing issue in the Networking: HTTP component 5.4 Medium Sep 29, 2026
CVE-2026-100819 Sandbox escape due to incorrect boundary conditions in the XPCOM component 9.6 Critical Sep 29, 2026
CVE-2026-100820 Privilege escalation in the Address Bar component 8.8 High Sep 29, 2026
CVE-2026-100817 Other issue in the JavaScript: WebAssembly component 5.4 Medium Sep 29, 2026
CVE-2026-100818 Sandbox escape due to use-after-free in the Widget: Gtk component 9.6 Critical Sep 29, 2026
CVE-2026-100816 Site isolation issue in the DOM: Networking component 8.1 High Sep 29, 2026
CVE-2026-100814 Incorrect boundary conditions in the JavaScript Engine: JIT component 8.8 High Sep 29, 2026
CVE-2026-100815 Use-after-free in the CSS Parsing and Computation component 8.8 High Sep 29, 2026
CVE-2026-100812 Denial-of-service in the Graphics component 6.5 Medium Sep 29, 2026
CVE-2026-100813 Invalid pointer in the JavaScript Engine: JIT component 8.8 High Sep 29, 2026
CVE-2026-100810 Other issue in the DevTools component 9.8 Critical Sep 29, 2026
CVE-2026-100811 Sandbox escape due to use-after-free in the DOM: Core & HTML component 9.6 Critical Sep 29, 2026
CVE-2026-100809 Same-origin policy bypass in the DevTools component 8.1 High Sep 29, 2026

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