PT-2026-61924

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

PT-2026-61893

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 same-origin policy bypass exists in the Networking: DNS component. The same-origin policy i...

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...

PT-2026-61877

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A privilege escalation issue exists within the DOM: Workers component. Recommendations Update Firefox to version 153. Update Thunderbird to version 153...

PT-2026-61885

Name of the Vulnerable Software and Affected Versions Firefox for Android versions prior to 153 Description An information disclosure issue exists within the Privacy component, which could allow sensitive data to be exposed. Recommendations Update to version 153...

PT-2026-61878

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A privilege escalation issue exists within the DOM Navigation component. Recommendations Update Firefox to version 153. Update Thunderbird to version 153...

PT-2026-61911

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A site isolation issue exists within the DOM Navigation component. Site isolation is a security mechanism that ensures web pages from different sites are processed in...

PT-2026-61921

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description An invalid pointer exists within the Security: PSM component. A pointer is a variable that stores the memory address of another value. Recommendations Update Firefox t...

PT-2026-61913

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A privilege escalation issue exists within the Data Loss Prevention component. Recommendations Update Firefox to version 153. Update Thunderbird to version 153...

PT-2026-61920

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: Playback component. An integer overflow occurs when an arithmetic operation attempts to create a numeric value that ...

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-2026-61906

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 Security component. The Document Object Model DOM is a programming interface for web documents that represents the page so th...

PT-2026-61909

Name of the Vulnerable Software and Affected Versions Firefox for Android versions prior to 153 Description A clickjacking issue exists in the WebExtensions component. Clickjacking is a technique where an attacker uses multiple transparent or semi-transparent layers to trick a user into clicking ...

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...

PT-2026-61916

Name of the Vulnerable Software and Affected Versions Firefox for Android versions prior to 153 Description A spoofing issue exists in Firefox for Android, which could allow an attacker to deceive users by impersonating a legitimate site or entity. Recommendations Update to version 153...

PT-2026-61910

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A site isolation issue exists within the Graphics component. Site isolation is a security mechanism that ensures web pages from different sites are processed in separa...

PT-2026-61922

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A JIT miscompilation issue exists within the JIT component of the JavaScript Engine. JIT Just-In-Time compilation is a method used by the engine to improve performance...

PT-2026-61901

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description An integer overflow occurs in the Libraries component of NSS due to incorrect boundary conditions. An integer overflow is a condition where an arithmetic operation...

PT-2026-61904

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153 Description A JIT miscompilation issue exists within the JIT component of the JavaScript Engine. JIT Just-In-Time compilation is a method used by the engine to improve performance...

PT-2026-61871

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...