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Mozilla FirefoxSandbox escape in the DOM: Content Processes component

Risk 80
Severity
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape in the DOM: Content Processes component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

First published (updated )
CVE-2026-109755

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

Risk 80
Severity
9.6
Buffer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

First published (updated )
CVE-2026-109708

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

Risk 48
Severity
9.3
EPSS
0.19%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

First published (updated )
CVE-2026-8950

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

Risk 58
Severity
9.6
EPSS
0.42%
Input Validation, Buffer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

First published (updated )
CVE-2026-8959

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

Risk 58
Severity
9.6
EPSS
0.53%
Use After Free
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

First published (updated )
CVE-2026-8953

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

Risk 47
Severity
9.1
EPSS
0.42%
XSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

First published (updated )
CVE-2026-8948

Mozilla FirefoxInteger overflow in the Networking: JAR component

Risk 61
Severity
9.8
EPSS
0.60%
Integer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

First published (updated )
CVE-2026-8956

Mozilla Firefox ESRSandbox escape in the DOM: Navigation component

Risk 80
Severity
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

First published (updated )
CVE-2026-100758

Mozilla FirefoxSandbox escape in the Security: Process Sandboxing component

Risk 80
Severity
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

First published (updated )
CVE-2026-100760

Mozilla FirefoxSandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component

Risk 80
Severity
9.6
Use After Free
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

First published (updated )
CVE-2026-109705

Mozilla FirefoxSandbox escape due to use-after-free in the Networking component

Risk 80
Severity
9.6
Use After Free
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

First published (updated )
CVE-2026-109707

Mozilla FirefoxMitigation bypass in the File Handling component

Risk 86
Severity
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158.

First published (updated )
CVE-2026-106016

Mozilla Firefox ESRSandbox escape due to use-after-free in the DOM: Content Processes component

Risk 80
Severity
9.6
Use After Free
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

First published (updated )
CVE-2026-100762

Mozilla FirefoxIncorrect boundary conditions in the Graphics: WebGPU component

Risk 66
Severity
9.1
Buffer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

First published (updated )
CVE-2026-100763

Mozilla FirefoxMitigation bypass in the Bookmarks & History component

Risk 80
Severity
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

First published (updated )
CVE-2026-100828

Mozilla FirefoxMitigation bypass in the DOM: Security component

Risk 80
Severity
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

First published (updated )
CVE-2026-100829

Mozilla FirefoxUse-after-free in the Audio/Video: GMP component

Risk 86
Severity
9.8
Use After Free
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Use-after-free in the Audio/Video: GMP component. This vulnerability was fixed in Firefox 146 and Thunderbird 146.

First published (updated )
CVE-2025-14326

Mozilla FirefoxJIT miscompilation in the JavaScript Engine: JIT component

Risk 86
Severity
9.8
Code Injection
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146, Firefox ESR < 115.31, and Firefox ESR < 140.6.

1 / 2
Source: Red Hat
First published (updated )
CVE-2025-14324

Mozilla FirefoxJIT miscompilation in the JavaScript Engine: JIT component

Risk 86
Severity
9.8
Buffer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 146 and Firefox ESR < 140.6.

1 / 2
Source: Red Hat
First published (updated )
CVE-2025-14330

Mozilla FirefoxUse-after-free in the WebRTC: Signaling component

Risk 86
Severity
9.8
Use After Free
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Use-after-free in the WebRTC: Signaling component. This vulnerability affects Firefox < 146 and Firefox ESR < 140.6.

1 / 2
Source: Red Hat
First published (updated )
CVE-2025-14321

Mozilla FirefoxSandbox escape in the DOM: Core & HTML component

Risk 58
Severity
9.6
EPSS
0.16%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

First published (updated )
CVE-2026-92018

Mozilla Firefox ESRSandbox escape due to use-after-free in the DOM: Content Processes component

Risk 80
Severity
9.6
Use After Free
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

First published (updated )
CVE-2026-100770

Mozilla Firefox ESRSandbox escape in the Graphics component

Risk 80
Severity
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

First published (updated )
CVE-2026-100775

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

Risk 58
Severity
9.6
EPSS
0.14%
Buffer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

First published (updated )
CVE-2026-92071

Mozilla FirefoxMitigation bypass in the Networking component

Risk 47
Severity
9.1
EPSS
0.16%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

First published (updated )
CVE-2026-92075

Mozilla FirefoxMitigation bypass in the Widget: Win32 component

Risk 47
Severity
9.1
EPSS
0.15%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation bypass in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

First published (updated )
CVE-2026-92079

Mozilla FirefoxMitigation bypass in the Enterprise Policies component

Risk 47
Severity
9.1
EPSS
0.15%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

First published (updated )
CVE-2026-92057

Mozilla FirefoxIncorrect boundary conditions in the DOM: Editor component

Risk 56
Severity
9.3
EPSS
0.14%
Buffer Overflow
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

First published (updated )
CVE-2026-92059

Mozilla FirefoxIncorrect boundary conditions in the Security: Process Sandboxing component

Risk 61
Severity
9.8
EPSS
0.14%
Buffer Overflow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Incorrect boundary conditions in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

First published (updated )
CVE-2026-92061

Mozilla FirefoxSandbox escape in the Profile Backup component

Risk 61
Severity
9.8
EPSS
0.14%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

First published (updated )
CVE-2026-92066

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