CVE-2026-124893

Use-after-free in the DOM: Workers component

Use-after-free in the DOM: Workers component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124892

Use-after-free in the JavaScript: GC component

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124891

Incorrect boundary conditions in the DOM: Selection component

Incorrect boundary conditions in the DOM: Selection component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124890

Use-after-free in the DOM: Core & HTML component

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124889

Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124888

Incorrect boundary conditions in the Layout: Text and Fonts component

Incorrect boundary conditions in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124887

Incorrect boundary conditions in the Layout: Text and Fonts component

Incorrect boundary conditions in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124886

Invalid pointer in the Layout: Text and Fonts component

Invalid pointer in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

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CVE-2026-124885

Use-after-free in the Graphics: Text component

Use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124884

Use-after-free in the JavaScript: GC component

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124883

Use-after-free in the DOM: Core & HTML component

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124882

Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Rhel Eus

CVE-2026-124881

Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Rhel Eus

CVE-2026-124880

Use-after-free in the DOM: Core & HTML component

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124879

Invalid pointer in the Networking: Cache component

Invalid pointer in the Networking: Cache component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

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CVE-2026-124877

Use-after-free in the Layout: Positioned component

Use-after-free in the Layout: Positioned component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124876

Use-after-free in the CSS Parsing and Computation component

Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Rhel Eus

CVE-2026-124875

Incorrect boundary conditions in the DOM: CSS Object Model component

Incorrect boundary conditions in the DOM: CSS Object Model component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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CVE-2026-124874

Same-origin policy bypass in the Networking: HTTP component

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

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CVE-2026-124873

Invalid pointer in the DOM: Editor component

Invalid pointer in the DOM: Editor component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

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