Mozilla
- 107
- vulnérabilités suivies
- 57
- critiques
- 18 août 2026
- dernière publication
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CVE-2026-74934Site isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-74935Privilege escalation in the DOM: Networking component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74936Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74937Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74938Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.1 CVE-2026-74939Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74940Use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74941Privilege escalation in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74942Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74943Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74944Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74946Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74947Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74949Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74950Privilege escalation in the Downloads API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74952Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74953Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74954Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-74955Privilege escalation in the Request Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74956Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.1 CVE-2026-74957Mitigation bypass in the Safe Browsing component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.1 CVE-2026-74958Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-74959Mitigation bypass in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.1 CVE-2026-74960Site isolation issue in the WebExtensions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.1 CVE-2026-74961Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.1 CVE-2026-74962Site isolation issue in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.1 CVE-2026-74964Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74965Privilege escalation in the Shell Integration component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74966Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-74969Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-74977Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-74978Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.1 CVE-2026-74979Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74981Site isolation issue in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.1 CVE-2026-74982Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-74983Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Élevée CVSS 8.1 CVE-2026-74985Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74986Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.1 CVE-2026-74987Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74988Internally found bugs present in Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74989Internally found bugs present in Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.Mozilla Firefox Critique CVSS 9.8 CVE-2026-74990Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.Mozilla Firefox Critique CVSS 9.8 CVE-2026-75874Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.Mozilla Firefox Critique CVSS 10 CVE-2026-14899The code to parse MIME headers for display when forwarding a message (if the setting to view all headers was enabled) had an off-by-one error, allowing a single byte to be read from the memory after the buffer for the headers, and potentially crashing Thunderbird. This vulnerability was fixed in Thunderbird 153 and Thunderbird 140.13.Mozilla Thunderbird Élevée CVSS 7.5 CVE-2026-16349Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16350Incorrect boundary conditions in the Audio/Video: cubeb component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16351Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16352Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16353Invalid pointer in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16354Information disclosure in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16355JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16356Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16357Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16358Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16359Incorrect boundary conditions in the Audio/Video: GMP component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16360Memory safety bugs present in Firefox ESR 115.37, Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16361Memory safety bugs present in Thunderbird ESR 140.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16362Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16363JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16364Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16365Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16366Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16367Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 10 CVE-2026-16368Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16369Integer overflow in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16370Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16371Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16372Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16373Information disclosure in the Privacy component in Firefox for Android. This vulnerability was fixed in Firefox 153.Mozilla Firefox Mobile Élevée CVSS 7.5 CVE-2026-16374Information disclosure in the Framework component in DevTools. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16375Site isolation issue in the Networking: HTTP component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16376Denial-of-service in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16377Mitigation bypass in the PDF Viewer component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16378Other issue in the DOM: Copy & Paste and Drag & Drop component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16379Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16380Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16381Same-origin policy bypass in the Networking: DNS component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16382Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16383Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16384Information disclosure due to uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16385Information disclosure due to uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16386Information disclosure due to uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16387Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16388Sandbox escape in the DOM: Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16389Incorrect boundary conditions, integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16390Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16391Information disclosure in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16392JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16393Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16394Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.1 CVE-2026-16395Integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16396Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16398Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16399Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16400Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16401Privilege escalation in the Data Loss Prevention component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Élevée CVSS 8.8 CVE-2026-16402Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.8 CVE-2026-16404Spoofing issue in Firefox for Android. This vulnerability was fixed in Firefox 153.Mozilla Firefox Mobile Élevée CVSS 7.4 CVE-2026-16405Information disclosure in the Networking: WebSockets component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Élevée CVSS 7.5 CVE-2026-16406Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critique CVSS 9.1 Les 100 plus récentes.