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**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 155 Firefox ESR versions prior to 153.2 Thunderbird versions prior to 155 Thunderbird versions prior to 153.2 **Description** An information disclosure issue exists within the Graphics: WebGPU component. WebGPU is a modern API that provides high-performance graphics and compute capabilities to web applications. **Recommendations** Update Firefox to version 155. Update Firefox ESR to version 153.2. Update Thunderbird to version 155. Update Thunderbird to version 153.2.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 155 Firefox ESR versions prior to 153.2 Thunderbird versions prior to 155 Thunderbird versions prior to 153.2 **Description** An issue exists within the Profile Backup component. **Recommendations** Update Firefox to version 155. Update Firefox ESR to version 153.2. Update Thunderbird to version 155. Update Thunderbird to version 153.2.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 154 Firefox ESR versions prior to 140.14 Firefox ESR versions prior to 153.1 Thunderbird versions prior to 154 Thunderbird ESR versions prior to 140.14 Thunderbird ESR versions prior to 153.1 **Description** An integer overflow occurs within the Graphics component. An integer overflow is a condition where an arithmetic operation attempts to create a numeric value that is outside of the range that can be represented with a given number of bits. **Recommendations** Update Firefox to version 154. Update Firefox ESR to version 140.14. Update Firefox ESR to version 153.1. Update Thunderbird to version 154. Update Thunderbird ESR to version 140.14. Update Thunderbird ESR to version 153.1.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 154 Firefox ESR versions prior to 140.14 Firefox ESR versions prior to 153.1 Thunderbird versions prior to 154 Thunderbird ESR versions prior to 140.14 Thunderbird ESR versions prior to 153.1 **Description** A same-origin policy bypass exists in the Networking: Cookies component. The same-origin policy is a critical security mechanism that restricts how a document or script loaded from one origin can interact with a resource from another origin. **Recommendations** Update Firefox to version 154. Update Firefox ESR to version 140.14. Update Firefox ESR to version 153.1. Update Thunderbird to version 154. Update Thunderbird ESR to version 140.14. Update Thunderbird ESR to version 153.1.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 154 Firefox ESR versions prior to 153.1 Thunderbird versions prior to 154 Thunderbird versions prior to 153.1 **Description** A site isolation issue exists within the Audio/Video: Web Codecs component. Site isolation is a security mechanism that ensures web pages from different sites are processed in separate processes to prevent one site from accessing data from another. **Recommendations** Update Firefox to version 154. Update Firefox ESR to version 153.1. Update Thunderbird to version 154. Update Thunderbird to version 153.1.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 154 Firefox ESR versions prior to 140.14 Firefox ESR versions prior to 153.1 Thunderbird versions prior to 154 Thunderbird ESR versions prior to 140.14 Thunderbird ESR versions prior to 153.1 **Description** A mitigation bypass exists within the Data Loss Prevention component. **Recommendations** Update Firefox to version 154. Update Firefox ESR to version 140.14. Update Firefox ESR to version 153.1. Update Thunderbird to version 154. Update Thunderbird ESR to version 140.14. Update Thunderbird ESR to version 153.1.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 154 Firefox ESR versions prior to 153.1 Thunderbird versions prior to 154 Thunderbird versions prior to 153.1 **Description** A site isolation issue exists within the CSS Parsing and Computation component. Site isolation is a security mechanism that ensures web pages from different sites are processed in separate processes to prevent data leakage. **Recommendations** Update Firefox to version 154. Update Firefox ESR to version 153.1. Update Thunderbird to version 154. Update Thunderbird to version 153.1.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 153 Thunderbird versions prior to 153 **Description** Information disclosure occurs due to uninitialized memory within the Graphics: WebGPU component. Uninitialized memory refers to a condition where a program uses a memory location before it has been assigned a specific value, potentially allowing the leakage of sensitive data from previous operations. **Recommendations** Update Firefox to version 153. Update Thunderbird to version 153.

**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 before reusing it, potentially allowing sensitive data from previous operations to be read. **Recommendations** Update Firefox to version 153 or later. Update Thunderbird to version 153 or later.

**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 is outside of the range that can be represented with a given number of bits. **Recommendations** Update Firefox to version 153. Update Thunderbird to version 153.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 153 Thunderbird versions prior to 153 **Description** Information disclosure occurs due to uninitialized memory within the Graphics: WebGPU component. WebGPU is a modern API that provides high-performance graphics and compute capabilities to web applications. **Recommendations** Update Firefox to version 153. Update Thunderbird to version 153.

**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** The Graphics component contains incorrect boundary conditions, which can lead to security issues. **Recommendations** Update Firefox to version 153 or later. Update Firefox ESR to version 115.38 or later. Update Firefox ESR to version 140.13 or later. Update Thunderbird to version 153 or later. Update Thunderbird to version 140.13 or later.