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

Risk 47
Severity
9.3
EPSS
0.02%
First published (updated )
CVE-2026-8950

Mozilla ThunderbirdSandbox escape due to incorrect boundary conditions in the Widget: Win32 component

Risk 58
Severity
9.6
EPSS
0.16%
First published (updated )
CVE-2026-8959

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

Risk 58
Severity
9.6
EPSS
0.05%
First published (updated )
CVE-2026-8953

Mozilla FirefoxSame-origin policy bypass in the DOM: Networking component

Risk 47
Severity
9.1
EPSS
0.04%
First published (updated )
CVE-2026-8948

Mozilla ThunderbirdInteger overflow in the Networking: JAR component

Risk 61
Severity
9.8
EPSS
0.06%
First published (updated )
CVE-2026-8956
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Mozilla FirefoxSandbox escape in the Profile Backup component

Risk 61
Severity
9.8
EPSS
0.08%
First published (updated )
CVE-2026-8401

Mozilla Firefox ESROther issue in the WebRTC component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-8094

Mozilla FirefoxPrivilege escalation in the Graphics: WebRender component

Risk 58
Severity
9.8
EPSS
0.04%
First published (updated )
CVE-2026-6750

Mozilla FirefoxMitigation bypass in the DOM: Security component

Risk 61
Severity
9.8
EPSS
0.06%
First published (updated )
CVE-2026-6771

Mozilla FirefoxUninitialized memory in the Audio/Video: Web Codecs component

Risk 61
Severity
9.8
EPSS
0.06%
First published (updated )
CVE-2026-6748
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Mozilla FirefoxMitigation bypass in the Networking: Cookies component

Risk 61
Severity
9.8
EPSS
0.05%
First published (updated )
CVE-2026-6768

Mozilla FirefoxMitigation bypass in the Networking: Cookies component

Risk 61
Severity
9.8
EPSS
0.05%
First published (updated )
CVE-2026-6760

Mozilla ThunderbirdSandbox escape due to incorrect boundary conditions in the WebRTC: Networking component

Risk 58
Severity
9.6
EPSS
0.04%
First published (updated )
CVE-2026-7321

Mozilla Firefox ESRIncorrect boundary conditions in the Audio/Video: Playback component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-8091

Mozilla FirefoxMemory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2

Risk 61
Severity
9.8
EPSS
0.07%
First published (updated )
CVE-2026-5731
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Mozilla ThunderbirdMemory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2

Risk 61
Severity
9.8
EPSS
0.06%
First published (updated )
CVE-2026-5734

Mozilla FirefoxMemory safety bugs fixed in Firefox 149.0.2 and Thunderbird 149.0.2

Risk 61
Severity
9.8
EPSS
0.05%
First published (updated )
CVE-2026-5735

Mozilla FirefoxMitigation bypass in the Networking: HTTP component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-4700

Mozilla FirefoxUse-after-free in the JavaScript Engine component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-4723

Mozilla FirefoxIncorrect boundary conditions in the Audio/Video component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-4710
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Mozilla FirefoxUndefined behavior in the Audio/Video component

Risk 47
Severity
9.1
EPSS
0.01%
First published (updated )
CVE-2026-4724

Mozilla FirefoxUse-after-free in the Layout: Text and Fonts component

Risk 61
Severity
9.8
EPSS
0.03%
First published (updated )
CVE-2026-4696

Mozilla FirefoxIncorrect boundary conditions, uninitialized memory in the JavaScript Engine component

Risk 47
Severity
9.1
EPSS
0.02%
First published (updated )
CVE-2026-4716

Mozilla FirefoxUndefined behavior in the WebRTC: Signaling component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-4705

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

Risk 61
Severity
10
EPSS
0.02%
First published (updated )
CVE-2026-4688
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Mozilla FirefoxJIT miscompilation in the JavaScript Engine component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-4702

Mozilla FirefoxUse-after-free in the CSS Parsing and Computation component

Risk 61
Severity
9.8
EPSS
0.03%
First published (updated )
CVE-2026-4691

Mozilla FirefoxSandbox escape due to use-after-free in the Graphics: Canvas2D component

Risk 61
Severity
10
EPSS
0.01%
First published (updated )
CVE-2026-4725

Mozilla FirefoxUse-after-free in the Widget: Cocoa component

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-4711

Mozilla FirefoxMemory safety bugs fixed in Firefox 149 and Thunderbird 149

Risk 61
Severity
9.8
EPSS
0.02%
First published (updated )
CVE-2026-4729
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