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Mozilla Firefox ESR12 vulnerabilities

Risk 42
Severity
9
First published (updated )
Advisory
MFSA2026-69

Incorrect boundary conditions in the Audio/Video: GMP component

Risk 66
Severity
9.1
First published (updated )
CVE-2026-16359

Incorrect boundary conditions in the Audio/Video: cubeb component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16350

JIT miscompilation in the JavaScript Engine: JIT component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16355

Invalid pointer in the DOM: Bindings (WebIDL) component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16353

Incorrect boundary conditions in the Graphics component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16357

Sandbox escape due to use-after-free in the Disability Access APIs component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16356

Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16360

Sandbox escape due to use-after-free in the Disability Access APIs component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16352

Memory safety bugs fixed in Thunderbird ESR 140.13

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16361

Site isolation issue in the Graphics: WebRender component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16358

Sandbox escape due to use-after-free in the DOM: Navigation component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16351

Same-origin policy bypass in the DOM: Navigation component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16349

Mozilla Firefox ESR22 vulnerabilities

Risk 42
Severity
9
First published (updated )
Advisory
MFSA2026-70

Incorrect boundary conditions in the Audio/Video: GMP component

Risk 66
Severity
9.1
First published (updated )
CVE-2026-16359

Incorrect boundary conditions in the Audio/Video: cubeb component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16350

JIT miscompilation in the JavaScript Engine: JIT component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16355

Incorrect boundary conditions in the JavaScript: WebAssembly component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16368

Invalid pointer in the DOM: Bindings (WebIDL) component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16353

Incorrect boundary conditions in the Graphics component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16357

JIT miscompilation in the JavaScript: WebAssembly component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16363

Integer overflow in the JavaScript: WebAssembly component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16369

Sandbox escape due to use-after-free in the Disability Access APIs component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16356

Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16360

Sandbox escape due to use-after-free in the Disability Access APIs component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16352

Memory safety bugs fixed in Thunderbird ESR 140.13

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16361

Site isolation issue in the Graphics: WebRender component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16358

Sandbox escape due to use-after-free in the DOM: Navigation component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16351

Same-origin policy bypass in the DOM: Navigation component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16349

Mitigation bypass in the PDF Viewer component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16377

Mitigation bypass in the DOM: Networking component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16383

Site isolation issue in the Networking: HTTP component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16375

Same-origin policy bypass in the Networking: DNS component

Risk 66
Severity
9.1
First published (updated )
CVE-2026-16381

Site isolation issue in the Networking component

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16387

Mitigation bypass in the Enterprise Policies component

Risk 66
Severity
9.1
First published (updated )
CVE-2026-16390

Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153

Risk 86
Severity
9.8
First published (updated )
CVE-2026-16412

Mozilla ThunderbirdSandbox escape in the Security: Process Sandboxing component

Risk 80
Severity
9.6
First published (updated )
CVE-2026-12296

Mozilla FirefoxSandbox escape due to incorrect boundary conditions in the Networking component

Risk 80
Severity
9.6
First published (updated )
CVE-2026-12297

Mozilla ThunderbirdSame-origin policy bypass in the Networking: Cookies component

Risk 66
Severity
9.1
First published (updated )
CVE-2026-12304
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Mozilla FirefoxSandbox escape in the DOM: Workers component

Risk 80
Severity
9.6
First published (updated )
CVE-2026-12294

Mozilla ThunderbirdMitigation bypass in the DOM: Security component

Risk 66
Severity
9.1
First published (updated )
CVE-2026-12315

Mozilla FirefoxSandbox escape in the DOM: Navigation component

Risk 80
Severity
9.6
First published (updated )
CVE-2026-12295

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