Mozilla
- 62
- vulnerabilities tracked
- 39
- critical
- 21 July 2026
- latest publication
cve
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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 Critical 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 Critical 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 Critical 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 Critical 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 Critical 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 High 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 Critical 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 Critical 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 Critical 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 Critical 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 Critical 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 Critical 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 Critical 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 High 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 Critical 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 Critical CVSS 9.1 CVE-2026-16365Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox High CVSS 8.8 CVE-2026-16366Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox High 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 Critical 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 Critical 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 Critical CVSS 9.8 CVE-2026-16370Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical 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 High 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 High 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 High 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 High 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 Critical 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 High 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 Critical 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 High 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 High CVSS 8.8 CVE-2026-16380Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical 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 Critical 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 Critical 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 Critical 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 High 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 High 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 High 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 Critical CVSS 9.8 CVE-2026-16388Sandbox escape in the DOM: Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical 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 Critical 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 Critical 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 High CVSS 7.5 CVE-2026-16393Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.1 CVE-2026-16394Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.1 CVE-2026-16395Integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical 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 High CVSS 8.8 CVE-2026-16398Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox High 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 High CVSS 7.5 CVE-2026-16400Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox High 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 High CVSS 8.8 CVE-2026-16402Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.8 CVE-2026-16404Spoofing issue in Firefox for Android. This vulnerability was fixed in Firefox 153.Mozilla Firefox Mobile High 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 High CVSS 7.5 CVE-2026-16406Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.1 CVE-2026-16407Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.8 CVE-2026-16408Integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.8 CVE-2026-16409Invalid pointer in the Security: PSM component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox High CVSS 7.5 CVE-2026-16410JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.8 CVE-2026-16411Memory safety bugs present in 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 and Thunderbird 153.Mozilla Firefox Critical CVSS 9.8 CVE-2026-16412Memory safety bugs present in 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 140.13, Thunderbird 153, and Thunderbird 140.13.Mozilla Firefox Critical CVSS 9.8 CVE-2026-14241Memory safety bugs present in Firefox 152.0.3. 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 152.0.4.Mozilla Firefox Critical CVSS 9.8