These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.
A critical vulnerability, CVE-2026-16381, was found in the Networking: DNS component, allowing for a same-origin policy bypass. This vulnerability has a high severity level with a CVSS score of 9.1. The vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Organizations and individuals using these products should prioritize patching to prevent potential same- [truncated]
A mitigation bypass vulnerability exists in the Networking component of Firefox and Thunderbird. The vulnerability was fixed in Firefox 153 and Thunderbird 153. Users should update their browsers to the latest versions to mitigate the vulnerability. This vulnerability has a CVSS score of 9.1 and a severity of CRITICAL. The affected products are Firefox and Thunderbird, and the vulnerability class is a mit [truncated]
CVE-2026-16379 is a critical vulnerability in the DOM: Content Processes component of Firefox, Firefox ESR, Thunderbird, and Thunderbird 140.13. The vulnerability allows for privilege escalation and was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The CVSS score for this vulnerability is 9.8, indicating a high severity level. Users of these products should update to t [truncated]
CVE-2026-16378 is a vulnerability in the DOM Copy & Paste and Drag & Drop component, fixed in Firefox 153 and Thunderbird 153. The vulnerability has a CVSS score of 7.5 and is considered HIGH severity. Users of Firefox and Thunderbird should update to versions 153 or later to address this vulnerability. The CVE record was published on 2026-07-21T13:17:12.967Z and has not been modified since then. The NVD [truncated]
A critical vulnerability was found in the PDF Viewer component of Firefox, Firefox ESR, Thunderbird, and other products that use this component. This vulnerability allows for mitigation bypass and has a CVSS score of 9.8, classified as CRITICAL. The vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Users of these products should apply the available patche [truncated]
A high-severity denial-of-service vulnerability was found in the Graphics: WebGPU component of Firefox and Thunderbird. The CVE record was published on 2026-07-21T13:17:12.760Z and has not been modified since then. The vulnerability has a CVSS score of 7.5, indicating a high severity. Users of Firefox and Thunderbird should apply the patches to prevent potential denial-of-service attacks. The vulnerabilit [truncated]
A site isolation issue was found in the Networking: HTTP component of Firefox, Firefox ESR, Thunderbird, and Thunderbird 140.13. The vulnerability, tracked as CVE-2026-16375, has a CVSS score of 9.8 and is classified as CRITICAL. The issue was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Users should update their browsers to the latest versions to mitigate the vulnera [truncated]
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-21T13:17:12.573Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. The Framework component in DevTools is vulnerable to information disclosure, which was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Users of these products sho [truncated]
A critical vulnerability, CVE-2026-16372, was found in the DOM: Content Processes component of Firefox and Thunderbird. This vulnerability allows for privilege escalation and was fixed in Firefox 153 and Thunderbird 153. The vulnerability has a CVSS score of 9.8 and is considered critical. Users of Firefox and Thunderbird should update to versions 153 to mitigate this critical vulnerability.
A mitigation bypass vulnerability exists in the DOM: Networking component of Firefox and Thunderbird. The vulnerability was fixed in Firefox 153 and Thunderbird 153. Users should update to the latest versions to mitigate the vulnerability. This issue has a significant impact on users of these products, as it could allow attackers to bypass existing mitigations. The vulnerability has a CVSS score of 9.1 an [truncated]
CVE-2026-16369 is an integer overflow vulnerability in the JavaScript: WebAssembly component. The issue was addressed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. This vulnerability has a CVSS score of 9.8 and is considered CRITICAL. Users of affected products should apply patches immediately to prevent exploitation.
CVE-2026-16368 is a critical vulnerability in the JavaScript: WebAssembly component due to incorrect boundary conditions. This issue affects Firefox, Firefox ESR, Thunderbird, and Thunderbird 140.13. The vulnerability was addressed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The NVD entry is currently Undergoing Analysis. Affected organizations should prioritize updates fo [truncated]
A critical vulnerability, CVE-2026-16367, was found in the Disability Access APIs component of Firefox and Thunderbird. This issue allows for sandbox escape due to an invalid pointer. The vulnerability was fixed in Firefox 153 and Thunderbird 153. Users and administrators should review the official advisories for detailed information on affected versions and mitigation steps.
CVE-2026-16366 is a critical vulnerability in the DOM: Navigation component of Firefox and Thunderbird. The vulnerability allows for privilege escalation and has a CVSS score of 9.8, indicating a critical severity level. The CVE record was published on 2026-07-21T13:17:05.140Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. Users of Firefox and Thunderbird should upda [truncated]
CVE-2026-16365 is a critical vulnerability in the DOM: Workers component, allowing for privilege escalation with a CVSS score of 9.8. It was fixed in Firefox 153 and Thunderbird 153. This vulnerability affects users of Firefox and Thunderbird, and it is recommended that users update to Firefox 153 and Thunderbird 153 to mitigate the vulnerability. The vulnerability was reported by [email protected].
The CVE record for CVE-2026-16364 was published on 2026-07-21T13:17:04.940Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. This critical vulnerability in the Audio/Video: Playback component due to incorrect boundary conditions affects users of Firefox and Thunderbird. It was fixed in Firefox 153 and Thunderbird 153, with a CVSS score of 9.1 and classified as CRITICAL [truncated]
A critical vulnerability, CVE-2026-16363, was found in the JavaScript: WebAssembly component, which could lead to JIT miscompilation. This issue was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The vulnerability has a CVSS score of 9.8 and is considered CRITICAL. Users of Firefox, Firefox ESR, Thunderbird, and other products based on these technologies should apply th [truncated]
CVE-2026-16362 is a high-severity use-after-free vulnerability in the WebRTC: Audio/Video component of Firefox, Firefox ESR, and Thunderbird. This type of vulnerability occurs when a program attempts to access memory after it has been freed, which can lead to crashes, data corruption, or potentially allow attackers to execute arbitrary code. The vulnerability was addressed in Firefox 153, Firefox ESR 140. [truncated]
CVE-2026-16361 is a critical vulnerability in Thunderbird ESR 140.12, involving memory safety bugs that could potentially lead to arbitrary code execution. The bugs showed evidence of memory corruption. Fixes were released in Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13. This vulnerability requires immediate attention due to its critical severity and potential impact. Organizations shoul [truncated]
A series of memory safety bugs were identified in Thunderbird ESR 140.12 and Thunderbird 152. These bugs showed evidence of memory corruption, and it is presumed that with sufficient effort, some of these could have been exploited to run arbitrary code. The vulnerabilities were addressed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. This debrief provides [truncated]
CVE-2026-16359 is a critical vulnerability in the Audio/Video: GMP component, with a CVSS score of 9.1. The vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. This vulnerability is caused by incorrect boundary conditions, which could allow an attacker to potentially exploit the vulnerability remotely. Users of Firefox, Firefox ESR, Thun [truncated]
A site isolation issue was found in the Graphics: WebRender component of Firefox, Firefox ESR, and Thunderbird. This vulnerability, tracked as CVE-2026-16358, could potentially allow an attacker to bypass site isolation, a security feature designed to prevent malicious scripts from accessing sensitive data on other websites. The issue was addressed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, T [truncated]
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-21T13:17:04.207Z and has not been modified since then. This critical vulnerability affects the Graphics component, with incorrect boundary conditions. It was addressed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Users should apply updates to preve [truncated]
A critical vulnerability, CVE-2026-16356, was published on 2026-07-21T13:17:04.100Z. The vulnerability is due to a sandbox escape caused by a use-after-free in the Disability Access APIs component. It was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. This vulnerability has a high severity with a CVSS score of 9.8, indicating potential significant im [truncated]
A critical vulnerability, CVE-2026-16355, was found in the JavaScript Engine's JIT component. This issue was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The vulnerability is caused by a JIT miscompilation in the JavaScript Engine, which could lead to potential code execution. Users and administrators of Firefox, Firefox ESR, and Thunderbird should [truncated]
The CVE record indicates an information disclosure vulnerability in the Graphics: ImageLib component of Mozilla products. This issue was fixed in multiple Mozilla products, including Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The vulnerability's operational impact could involve unintended disclosure of sensitive information. However, the exact scope and p [truncated]
A critical vulnerability, CVE-2026-16353, exists in the DOM: Bindings (WebIDL) component of Firefox, Firefox ESR, and Thunderbird. This issue involves an invalid pointer and was addressed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The vulnerability has a CVSS score of 9.8 and is considered critical. Users of these products should apply patches immediat [truncated]
A critical vulnerability, CVE-2026-16352, was published on 2026-07-21T13:17:03.693Z. It involves a sandbox escape due to a use-after-free in the Disability Access APIs component. This issue was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The vulnerability allows attackers to bypass the sandbox, potentially leading to arbitrary code execution. Orga [truncated]
CVE-2026-16350 is a critical vulnerability caused by incorrect boundary conditions in the Audio/Video: cubeb component. This vulnerability affects Firefox, Firefox ESR, and Thunderbird. The CVE record was published on 2026-07-21T13:17:03.470Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. Users of these products should apply updates to prevent exploitation.
A critical vulnerability CVE-2026-16349 was found in the DOM: Navigation component, allowing for a same-origin policy bypass. This issue was addressed in various Mozilla products, including Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The vulnerability enables attackers to bypass the same-origin policy, potentially leading to unauthorized access to sensitive data.
