PT-2026-61907

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description An integer overflow exists within the Audio/Video component. An integer overflow occurs when an arithmetic operation attempts to create a numeric value that is outside...

PT-2026-61919

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A mitigation bypass exists within the DOM: Service Workers component. Service Workers are scripts that the browser runs in the background, separate from a web page,...

PT-2026-61865

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 115.38 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird version prior to 140.13 Description An invalid pointer exists within the Bindings WebIDL...

PT-2026-61887

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description A site isolation issue exists within the Networking: HTTP component. Recommendations Update...

PT-2026-61868

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 115.38 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird version prior to 140.13 Description A use-after-free issue exists in the Disability Access AP...

PT-2026-61898

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description An information disclosure issue exists in the Graphics: WebGPU component caused by uninitialized memory. This occurs when the system fails to clear a memory area befor...

Security Vulnerabilities fixed in Firefox 153 — Mozilla

Memory safety bugs present in Firefox 152. 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. Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. Some of these bugs showed...

Security Vulnerabilities fixed in Firefox ESR 140.13 — Mozilla

We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. Memory safety bugs present in Firefox ESR 140.12 and...

PT-2026-61867

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 115.38 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird version prior to 140.13 Description A JIT miscompilation issue exists within the JIT componen...

PT-2026-61872

Name of the Vulnerable Software and Affected Versions Firefox ESR version 115.37 Firefox ESR version 140.12 Firefox version 152 Thunderbird ESR version 140.12 Thunderbird version 152 Description Memory safety bugs were identified that showed evidence of memory corruption. These issues could...

PT-2026-61880

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description Incorrect boundary conditions exist within the JavaScript: WebAssembly component...

PT-2026-61862

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 115.38 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird version prior to 140.13 Description Incorrect boundary conditions exist within the Audio/Vide...

PT-2026-61902

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description A mitigation bypass exists within the Enterprise Policies component. Recommendations Update...

PT-2026-61889

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description A mitigation bypass exists within the PDF Viewer component. Recommendations Update Firefox to...

PT-2026-61899

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description A site isolation issue exists within the Networking component. Recommendations Update Firefox...

PT-2026-61917

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description An information disclosure issue exists within the Networking: WebSockets component. WebSocket...

PT-2026-61863

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 115.38 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird version prior to 140.13 Description A use-after-free issue exists in the DOM: Navigation...

PT-2026-61861

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 115.38 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird version prior to 140.13 Description A same-origin policy bypass exists in the DOM Navigation...

PT-2026-61891

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 Description A privilege escalation issue exists within the DOM: Content Processes component...

Mozilla Firefox ESR < 115.38

The version of Firefox ESR installed on the remote Windows host is prior to 115.38. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-69 advisory. - We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing thi...