Mozilla Firefox
3372 CVEs affecting Mozilla Firefox. Latest disclosed: 2026-09-01. Critical: 473, High: 833.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2026-75874 | Critical | 10.0 | 2026-08-18 | Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 115.40, Firefox ESR 140.15, F… |
CVE-2026-16367 | Critical | 10.0 | 2026-07-21 | Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. |
CVE-2026-4725 | Critical | 10.0 | 2026-03-24 | Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149 and Thunderbird 149. |
CVE-2026-4692 | Critical | 10.0 | 2026-03-24 | Sandbox escape in the Responsive Design Mode component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, an… |
CVE-2026-4689 | Critical | 10.0 | 2026-03-24 | Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34… |
CVE-2026-4688 | Critical | 10.0 | 2026-03-24 | Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149… |
CVE-2026-2778 | Critical | 10.0 | 2026-02-24 | Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox… |
CVE-2026-2776 | Critical | 10.0 | 2026-02-24 | Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 1… |
CVE-2026-2768 | Critical | 10.0 | 2026-02-24 | Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. |
CVE-2026-2761 | Critical | 10.0 | 2026-02-24 | Sandbox escape in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and T… |
CVE-2026-2760 | Critical | 10.0 | 2026-02-24 | Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Fire… |
CVE-2026-0881 | Critical | 10.0 | 2026-01-13 | Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147. |
CVE-2025-2857 | Critical | 10.0 | 2025-03-27 | Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child proces… |
CVE-2019-25136 | Critical | 10.0 | 2023-06-19 | A compromised child process could have injected XBL Bindings into privileged CSS rules, resulting in arbitrary code execution and a sandbox escape. This vulner… |
CVE-2021-4140 | Critical | 10.0 | 2022-12-22 | It was possible to construct specific XSLT markup that would be able to bypass an iframe sandbox. This vulnerability affects Firefox ESR < 91.5, Firefox < 96… |
CVE-2021-38503 | Critical | 10.0 | 2021-12-08 | The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the… |
CVE-2020-12389 | Critical | 10.0 | 2020-05-26 | The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape. *Note: this issue only affects Firefox on Wi… |
CVE-2020-12388 | Critical | 10.0 | 2020-05-26 | The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape. *Note: this issue only affects Firefox on Wi… |
CVE-2019-11708 | Critical | 10.0 | 2019-07-23 | Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process op… |
CVE-2018-18505 | Critical | 10.0 | 2019-02-05 | An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-3079, added authentication to communication between IPC endpoints and server pa… |