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Last week
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Mozilla Firefox ESR12 vulnerabilities

Risk 33
Severity
7
First published (updated )
Advisory
MFSA2026-48

Mitigation bypass in the DOM: Security component

Risk 42
Severity
8.1
EPSS
0.04%
First published (updated )
CVE-2026-8962

Incorrect boundary conditions in the Audio/Video: Web Codecs component

Risk 31
Severity
7.5
EPSS
0.04%
First published (updated )
CVE-2026-8946

Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component

Risk 31
Severity
7.5
EPSS
0.05%
First published (updated )
CVE-2026-8968

Privilege escalation in the Security component

Risk 56
Severity
8.8
EPSS
0.04%
First published (updated )
CVE-2026-8970

Use-after-free in the DOM: Bindings (WebIDL) component

Risk 36
Severity
7.3
EPSS
0.05%
First published (updated )
CVE-2026-8947

Incorrect boundary conditions, integer overflow in the Audio/Video component

Risk 31
Severity
7.5
EPSS
0.03%
First published (updated )
CVE-2026-8954

Privilege escalation in the DOM: Workers component

Risk 56
Severity
8.8
EPSS
0.04%
First published (updated )
CVE-2026-8955

Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151

Risk 56
Severity
8.8
EPSS
0.04%
First published (updated )
CVE-2026-8974

Information disclosure, sandbox escape in the Security: Process Sandboxing component

Risk 34
Severity
8.6
EPSS
0.04%
First published (updated )
CVE-2026-8958

Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151

Risk 56
Severity
8.8
EPSS
0.04%
First published (updated )
CVE-2026-8975

Privilege escalation in the Enterprise Policies component

Risk 56
Severity
8.8
EPSS
0.04%
First published (updated )
CVE-2026-8957

Integer overflow in the Widget: Win32 component

Risk 31
Severity
7.5
EPSS
0.05%
First published (updated )
CVE-2026-8949

Mozilla Firefox ESR3 vulnerabilities

Risk 33
Severity
7
First published (updated )
Advisory
MFSA2026-47

Incorrect boundary conditions in the Audio/Video: Web Codecs component

Risk 31
Severity
7.5
EPSS
0.04%
First published (updated )
CVE-2026-8946

Use-after-free in the DOM: Bindings (WebIDL) component

Risk 36
Severity
7.3
EPSS
0.05%
First published (updated )
CVE-2026-8947

Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151

Risk 56
Severity
8.8
EPSS
0.04%
First published (updated )
CVE-2026-8975

Mozilla Firefox ESR2 vulnerabilities

Risk 33
Severity
7
First published (updated )
Advisory
MFSA2026-41

Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thunderbird 150.0.2

Risk 54
Severity
8.1
EPSS
0.02%
First published (updated )
CVE-2026-8092

Use-after-free in the DOM: Networking component

Risk 36
Severity
7.3
EPSS
0.02%
First published (updated )
CVE-2026-8090

Mozilla Firefox ESR2 vulnerabilities

Risk 33
Severity
7
First published (updated )
Advisory
MFSA2026-42

Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thunderbird 150.0.2

Risk 54
Severity
8.1
EPSS
0.02%
First published (updated )
CVE-2026-8092

Use-after-free in the DOM: Networking component

Risk 36
Severity
7.3
EPSS
0.02%
First published (updated )
CVE-2026-8090

Mozilla Firefox ESRMemory safety bugs present in Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Th…

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2463481
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Mozilla FirefoxInformation disclosure due to incorrect boundary conditions in the Audio/Video component. This vulne…

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2463483

Mozilla Firefox ESRMemory safety bugs present in Firefox ESR 115.35.0, Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, …

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2463484

Mozilla Firefox ESR3 vulnerabilities

Risk 33
Severity
7
First published (updated )
Advisory
MFSA2026-36

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Risk 36
Severity
7.3
EPSS
0.02%
First published (updated )
CVE-2026-7323

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Risk 36
Severity
7.3
EPSS
0.02%
First published (updated )
CVE-2026-7322

Information disclosure due to incorrect boundary conditions in the Audio/Video component

Risk 31
Severity
7.5
EPSS
0.05%
First published (updated )
CVE-2026-7320

Mozilla Firefox ESR2 vulnerabilities

Risk 33
Severity
7
First published (updated )
Advisory
MFSA2026-37

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Risk 36
Severity
7.3
EPSS
0.02%
First published (updated )
CVE-2026-7322

Information disclosure due to incorrect boundary conditions in the Audio/Video component

Risk 31
Severity
7.5
EPSS
0.05%
First published (updated )
CVE-2026-7320

Mozilla Firefox ESRMemory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox …

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2460104
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Mozilla FirefoxUninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firef…

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2460103

Mozilla FirefoxUse After Free

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2460112

Mozilla FirefoxUninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firef…

Risk 33
Severity
7
First published (updated )
REDHAT-BUG-2460109

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