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CVE-2026-74951

Clickjacking issue in Firefox for Android

Clickjacking issue in Firefox for Android. This vulnerability was fixed in Firefox 154.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Firefox Mobile
CVE-2026-74965

Privilege escalation in the Shell Integration component

Privilege 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.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74963

Same-origin policy bypass in the Networking: Cookies component

Same-origin policy bypass 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.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74958

Information disclosure in the WebRTC component

Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74956

Same-origin policy bypass in the DOM: Service Workers component

Same-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.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74955

Privilege escalation in the Request Handling component

Privilege escalation in the Request Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74954

Information disclosure due to side-channel in the Storage: Cache API component

Information 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.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74950

Privilege escalation in the Downloads API component

Privilege escalation in the Downloads API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74947

Privilege escalation due to invalid pointer in the Graphics component

Privilege 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.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74938

Mitigation bypass in the JavaScript: GC component

Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-74937

Use-after-free in the JavaScript: GC component

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-14899

Off-by-one out of bounds read in MIME header parser for forwarding

The 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.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Thunderbird
CVE-2026-8091

Incorrect boundary conditions in the Audio/Video: Playback component

Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-18809

Information disclosure in Firefox for Android and Firefox Focus for Android

Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox
CVE-2026-16392

JIT miscompilation in the JavaScript Engine: JIT component

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

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-16364

Incorrect boundary conditions in the Audio/Video: Playback component

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

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-16367

Sandbox escape due to invalid pointer in the Disability Access APIs component

Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-16373

Information disclosure in the Privacy component in Firefox for Android

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

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Firefox Mobile
CVE-2026-16376

Denial-of-service in the Graphics: WebGPU component

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

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird
CVE-2026-16380

Mitigation bypass in the Networking component

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

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Mozilla
Products
Firefox Thunderbird