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Vulnerabilities published in the last 30 days. Filter by severity, exploit status, or attack vector.

All Critical Actively Exploited Remotely Exploitable
Last Updated Published CVSS Score
Score
Vulnerability
Published
9.8 CRITICAL
CVE-2026-2775 — Mitigation bypass in the DOM: HTML Parser component

Mitigation bypass in the DOM: HTML Parser component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Cross-Site Scripting
Feb 24, 2026 Feb 28, 2026
Feb 24, 2026
Feb 28, 2026
9.8 CRITICAL
CVE-2026-2774 — Integer overflow in the Audio/Video component

Integer overflow in the Audio/Video component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2773 — Incorrect boundary conditions in the Web Audio component

Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 28, 2026
Feb 24, 2026
Feb 28, 2026
9.8 CRITICAL
CVE-2026-2772 — Use-after-free in the Audio/Video: Playback component

Use-after-free in the Audio/Video: Playback component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2771 — Undefined behavior in the DOM: Core & HTML component

Undefined behavior in the DOM: Core & HTML component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 25, 2026
Feb 24, 2026
Feb 25, 2026
9.8 CRITICAL
CVE-2026-2770 — Use-after-free in the DOM: Bindings (WebIDL) component

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
8.8 HIGH
CVE-2026-2769 — Use-after-free in the Storage: IndexedDB component

Use-after-free in the Storage: IndexedDB component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 25, 2026
Feb 24, 2026
Feb 25, 2026
10.0 CRITICAL
CVE-2026-2768 — Sandbox escape in the Storage: IndexedDB component

Sandbox escape in the Storage: IndexedDB component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Misconfiguration
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2767 — Use-after-free in the JavaScript: WebAssembly component

Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2766 — Use-after-free in the JavaScript Engine: JIT component

Use-after-free in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 28, 2026
Feb 24, 2026
Feb 28, 2026
9.8 CRITICAL
CVE-2026-2765 — Use-after-free in the JavaScript Engine component

Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 28, 2026
Feb 24, 2026
Feb 28, 2026
9.8 CRITICAL
CVE-2026-2764 — JIT miscompilation, use-after-free in the JavaScript Engine: JIT component

JIT miscompilation, use-after-free in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 1…

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 28, 2026
Feb 24, 2026
Feb 28, 2026
9.8 CRITICAL
CVE-2026-2763 — Use-after-free in the JavaScript Engine component

Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 28, 2026
Feb 24, 2026
Feb 28, 2026
9.8 CRITICAL
CVE-2026-2762 — Integer overflow in the JavaScript: Standard Library component

Integer overflow in the JavaScript: Standard Library component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 28, 2026
Feb 24, 2026
Feb 28, 2026
10.0 CRITICAL
CVE-2026-2761 — Sandbox escape in the Graphics: WebRender component

Sandbox escape in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Misconfiguration
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
10.0 CRITICAL
CVE-2026-2760 — Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and T…

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2759 — Incorrect boundary conditions in the Graphics: ImageLib component

Incorrect boundary conditions in the Graphics: ImageLib component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2758 — Use-after-free in the JavaScript: GC component

Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2757 — Incorrect boundary conditions in the WebRTC: Audio/Video component

Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

firefox firefox_esr thunderbird | Remote | Memory Corruption
Feb 24, 2026 Feb 26, 2026
Feb 24, 2026
Feb 26, 2026
9.8 CRITICAL
CVE-2026-2634 — Spoofed web content presented under trusted domains using scripted navigation on Firefox …

Malicious scripts could cause desynchronization between the address bar and web content before a response is received in Firefox iOS, allowing attacker-controlled pages to be presented under spoofed …

firefox | Remote | Cross-Site Scripting
Feb 24, 2026 Feb 27, 2026
Feb 24, 2026
Feb 27, 2026
Showing 20 of 5272 Results