🚨 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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You are not authorized to access bug 2044280. To see this bug, you must
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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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You are not authorized to access bug 2055028. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2057834. To see this bug, you must
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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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You are not authorized to access bug 2060008. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2063020. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2032388. To see this bug, you must
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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
You are not authorized to access bug 2044882. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2046661. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2048699. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2051146. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2056164. To see this bug, you must
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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
You are not authorized to access bug 2060153. To see this bug, you must
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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
Access Denied
You are not authorized to access bug 2063780. To see this bug, you must
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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
Access Denied
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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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🚨 CVE-2026-84144
Internally found bugs present in Firefox 154 and Firefox ESR 153.1. 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 and Firefox ESR 153.2.
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Internally found bugs present in Firefox 154 and Firefox ESR 153.1. 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 and Firefox ESR 153.2.
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🚨 CVE-2026-84145
Internally found bugs present in Firefox 154, Firefox ESR 153.1, Firefox ESR 140.14 and Firefox ESR 115.39. 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 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.
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Internally found bugs present in Firefox 154, Firefox ESR 153.1, Firefox ESR 140.14 and Firefox ESR 115.39. 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 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.
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