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Vulnerabilities of Mozilla Firefox

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CVE Summary Score Published
CVE-2026-84135 Other issue in Firefox Focus for Android 9.8 Critical Sep 1, 2026
CVE-2026-84134 Other issue in the Profile Backup component 9.8 Critical Sep 1, 2026
CVE-2026-84133 Site isolation issue in the DOM: Push Subscriptions component 9.8 Critical Sep 1, 2026
CVE-2026-84129 Site isolation issue in the DOM: Navigation component 9.8 Critical Sep 1, 2026
CVE-2026-84121 Sandbox escape due to use-after-free in the DOM: Security component 9.6 Critical Sep 1, 2026
CVE-2026-84119 Sandbox escape due to use-after-free in the DOM: Navigation component 9.6 Critical Sep 1, 2026
CVE-2026-74985 Privilege escalation in the Enterprise Policies component 9.8 Critical Aug 18, 2026
CVE-2026-74986 Site isolation issue in the CSS Parsing and Computation component 9.1 Critical Aug 18, 2026
CVE-2026-74988 Internally found bugs present in Firefox ESR 153.0 and Firefox 153 9.8 Critical Aug 18, 2026
CVE-2026-74989 Internally found bugs present in Firefox 153 9.8 Critical Aug 18, 2026
CVE-2026-74979 Mitigation bypass in the Add-ons Manager component 9.8 Critical Aug 18, 2026
CVE-2026-74961 Side-channel in the Web Audio component 9.1 Critical Aug 18, 2026
CVE-2026-74956 Same-origin policy bypass in the DOM: Service Workers component 9.1 Critical Aug 18, 2026
CVE-2026-74938 Mitigation bypass in the JavaScript: GC component 9.1 Critical Aug 18, 2026
CVE-2026-74990 Internally found bugs present in Firefox ESR 115.38, Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153 9.8 Critical Aug 18, 2026
CVE-2026-75874 Sandbox escape in the Remote Settings Client component 10.0 Critical Aug 18, 2026
CVE-2026-74987 Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153 9.8 Critical Aug 18, 2026
CVE-2026-74964 Integer overflow in the Graphics component 9.8 Critical Aug 18, 2026
CVE-2026-74959 Mitigation bypass in the Storage: Cache API component 9.1 Critical Aug 18, 2026
CVE-2026-74944 Use-after-free in the DOM: Core & HTML component 9.8 Critical Aug 18, 2026
CVE-2026-74943 Use-after-free in the Graphics: ImageLib component 9.8 Critical Aug 18, 2026
CVE-2026-74940 Use-after-free in the Graphics: Text component 9.8 Critical Aug 18, 2026
CVE-2026-74936 Use-after-free in the JavaScript: WebAssembly component 9.8 Critical Aug 18, 2026
CVE-2026-16361 Memory safety bugs present in Thunderbird ESR 140.12 9.8 Critical Jul 21, 2026
CVE-2026-16360 Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152 9.8 Critical Jul 21, 2026

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