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CVE-2026-7323

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
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CVE-2026-6784

Memory safety bugs fixed in Firefox 150 and Thunderbird 150

Memory safety bugs present in Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-2919

Attacker-controlled content shown under spoofed domains in Focus for iOS via stalled navigation and iframe redirect

Malicious scripts could display attacker-controlled web content under spoofed domains in Focus for iOS by stalling a _self navigation to an invalid port and triggering an iframe redirect, causing the UI to display a trusted domain without user interaction. This vulnerability was fixed in Focus for iOS 148.2.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2026-7321

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

Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
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CVE-2026-7320

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

Information disclosure due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-7324

Memory safety bugs fixed in Thunderbird 150.0.1

Memory safety bugs present in Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1 and Thunderbird 150.0.1.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
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CVE-2026-6786

Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150

Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-6760

Mitigation bypass in the Networking: Cookies component

Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2026-6762

Spoofing issue in the DOM: Core & HTML component

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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CVE-2026-6750

Privilege escalation in the Graphics: WebRender component

Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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CVE-2026-6769

Privilege escalation in the Debugger component

Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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CVE-2026-6761

Privilege escalation in the Networking component

Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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CVE-2007-0981

: seamonkey cookie setting / same-domain bypass vulnerability

Mozilla based browsers, including Firefox before 1.5.0.10 and 2.x before 2.0.0.2, and SeaMonkey before 1.0.8, allow remote attackers to bypass the same origin policy, steal cookies, and conduct other attacks by writing a URI with a null byte to the hostname (location.hostname) DOM property, due to interactions with DNS resolver code.

CVSS 2.0 · 7.5 High EPSS 12.8% KEV · Not listed
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CVE-2010-0220

: Firefox DoS (crash) via crafted web site that triggers memory consumption

The nsObserverList::FillObserverArray function in xpcom/ds/nsObserverList.cpp in Mozilla Firefox before 3.5.7 allows remote attackers to cause a denial of service (application crash) via a crafted web site that triggers memory consumption and an accompanying Low Memory alert dialog, and also triggers attempted removal of an observer from an empty observers array.

CVSS 2.0 · 5.0 Medium EPSS 1.5% KEV · Not listed
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CVE-2009-3978

Seamonkey: NULL pointer dereference in GIF decoder

The nsGIFDecoder2::GifWrite function in decoders/gif/nsGIFDecoder2.cpp in libpr0n in Mozilla Firefox before 3.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an animated GIF file with a large image size, a different vulnerability than CVE-2009-3373.

CVSS 2.0 · 4.3 Medium EPSS 1.8% KEV · Not listed
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CVE-2009-3979

Mozilla crash with evidence of memory corruption

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, SeaMonkey before 2.0.1, and Thunderbird allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

CVSS 2.0 · 9.3 Critical EPSS 4.0% KEV · Not listed
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CVE-2009-3980

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox 3.5.x before 3.5.6, SeaMonkey before 2.0.1, and Thunderbird allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

CVSS 2.0 · 9.3 Critical EPSS 3.7% KEV · Not listed
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CVE-2009-3981

Mozilla crashes with evidence of memory corruption

Unspecified vulnerability in the browser engine in Mozilla Firefox before 3.0.16, SeaMonkey before 2.0.1, and Thunderbird allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

CVSS 2.0 · 9.3 Critical EPSS 3.7% KEV · Not listed
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CVE-2009-3982

Multiple unspecified vulnerabilities in the JavaScript engine in Mozilla Firefox 3.5.x before 3.5.6, SeaMonkey before 2.0.1, and Thunderbird allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

CVSS 2.0 · 9.3 Critical EPSS 3.9% KEV · Not listed
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CVE-2009-3983

Mozilla NTLM reflection vulnerability

Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote attackers to send authenticated requests to arbitrary applications by replaying the NTLM credentials of a browser user.

CVSS 2.0 · 6.8 Medium EPSS 2.2% KEV · Not listed
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