🚨 CVE-2026-84122
Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.
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Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84123
Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84124
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.
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Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84126
Incorrect boundary conditions in the Layout: Grid component. This vulnerability was fixed in Firefox 155.
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Incorrect boundary conditions in the Layout: Grid component. This vulnerability was fixed in Firefox 155.
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bugzilla.mozilla.org
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🚨 CVE-2026-84127
Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.
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Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.
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bugzilla.mozilla.org
1699444 - (CVE-2026-84127) Tabs opened by extensions are displayed as private when they are not
RESOLVED (rob) in Firefox for Android - WebExtensions. Last updated 2026-09-01.
🚨 CVE-2026-84128
Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155.
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Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155.
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bugzilla.mozilla.org
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🚨 CVE-2026-84129
Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84130
Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84131
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.
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Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84132
Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84133
Site isolation issue in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Site isolation issue in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84134
Other issue in the Profile Backup component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Other issue in the Profile Backup component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
Access Denied
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🚨 CVE-2026-84135
Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.
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Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.
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bugzilla.mozilla.org
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🚨 CVE-2026-84136
Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84137
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84138
Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155.
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Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155.
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bugzilla.mozilla.org
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🚨 CVE-2026-84139
Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
Access Denied
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🚨 CVE-2026-84140
Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84141
Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
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bugzilla.mozilla.org
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🚨 CVE-2026-84142
Internally found bugs present in Firefox 154. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155.
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Internally found bugs present in Firefox 154. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155.
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🚨 CVE-2026-84143
Internally found bugs present in Firefox 154, Firefox ESR 153.1 and Firefox ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.
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Internally found bugs present in Firefox 154, Firefox ESR 153.1 and Firefox ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.
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