2026

Memory safety bugs present in Thunderbird 152. Some of these bugs showed evidence of memory corruption and we presume th

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird

Invalid pointer in the Security: PSM component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 153 and Thunderbird 153

Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153

Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Information disclosure in the Networking: WebSockets component. This vulnerability was fixed in Firefox 153, Firefox ESR

Spoofing issue in Firefox for Android. This vulnerability was fixed in Firefox 153.

Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Privilege escalation in the Data Loss Prevention component. This vulnerability was fixed in Firefox 153 and Thunderbird

Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Clickjacking issue in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 153.

Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153,

Integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunder

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird

Information disclosure in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 153, Firefox ESR 140

Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13,

Incorrect boundary conditions, integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firef

Sandbox escape in the DOM: Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thund

Information disclosure due to uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Fi

Information disclosure due to uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Fi

Information disclosure due to uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Fi

Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thu

Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153

Same-origin policy bypass in the Networking: DNS component. This vulnerability was fixed in Firefox 153, Firefox ESR 140

Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153, Firefox ESR 1

Other issue in the DOM: Copy & Paste and Drag & Drop component. This vulnerability was fixed in Firefox 153 and Thunderb

Mitigation bypass in the PDF Viewer component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderb

Denial-of-service in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Site isolation issue in the Networking: HTTP component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13,

Information disclosure in the Framework component in DevTools. This vulnerability was fixed in Firefox 153, Firefox ESR

Information disclosure in the Privacy component in Firefox for Android. This vulnerability was fixed in Firefox 153.

Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153 and Thunderbir

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13,

Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Integer overflow in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.

Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Fir

Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was fixed in Firefox 1

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153, Thunderbird 153, Firefo

Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 153 and Th

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 14

Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Th