# Mozilla Firefox (en-US) 153.0 Mozilla Firefox (en-US) 153.0, released July 21, 2026, fixes 61 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every one of these CVEs. - Web page: https://patchblox.com/security/fix/windows-app/mozilla.firefox-153.0 - Platform: Windows apps - Released: Jul 21, 2026 - Priority: Urgent (Closes CVE-2026-16357, rated Critical) - CVEs: 61, exploited: 0, on CISA KEV: 0 - Superseded by: [Mozilla Firefox (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md), the latest version, which also fixes every CVE listed here ## Applies to | Product | Release | Fixed in | |---|---|---| | [Mozilla Firefox (en-US)](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md) | | 153.0 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-16357](https://patchblox.com/security/data/cve/CVE-2026-16357.md) | Urgent | Incorrect boundary conditions in the Graphics component | 9.8 | 0.0087 | | | [CVE-2026-16412](https://patchblox.com/security/data/cve/CVE-2026-16412.md) | Urgent | Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153 | 9.8 | 0.0064 | | | [CVE-2026-16395](https://patchblox.com/security/data/cve/CVE-2026-16395.md) | Urgent | Integer overflow in the Audio/Video component | 9.8 | 0.0062 | | | [CVE-2026-16402](https://patchblox.com/security/data/cve/CVE-2026-16402.md) | Urgent | Integer overflow in the Graphics: ImageLib component | 9.8 | 0.0062 | | | [CVE-2026-16408](https://patchblox.com/security/data/cve/CVE-2026-16408.md) | Urgent | Integer overflow in the Audio/Video: Playback component | 9.8 | 0.0062 | | | [CVE-2026-16389](https://patchblox.com/security/data/cve/CVE-2026-16389.md) | Urgent | Incorrect boundary conditions, integer overflow in the Libraries component in NSS | 9.8 | 0.0057 | | | [CVE-2026-16382](https://patchblox.com/security/data/cve/CVE-2026-16382.md) | Urgent | Mitigation bypass in the DOM: Service Workers component | 9.8 | 0.0056 | | | [CVE-2026-16388](https://patchblox.com/security/data/cve/CVE-2026-16388.md) | Urgent | Sandbox escape in the DOM: Networking component | 9.8 | 0.0055 | | | [CVE-2026-16410](https://patchblox.com/security/data/cve/CVE-2026-16410.md) | Urgent | JIT miscompilation in the JavaScript Engine: JIT component | 9.8 | 0.0055 | | | [CVE-2026-16393](https://patchblox.com/security/data/cve/CVE-2026-16393.md) | Urgent | Incorrect boundary conditions in the Graphics: WebGPU component | 9.1 | 0.0054 | | | [CVE-2026-16392](https://patchblox.com/security/data/cve/CVE-2026-16392.md) | Urgent | JIT miscompilation in the JavaScript Engine: JIT component | 9.1 | 0.0053 | | | [CVE-2026-16353](https://patchblox.com/security/data/cve/CVE-2026-16353.md) | Urgent | Invalid pointer in the DOM: Bindings (WebIDL) component | 9.8 | 0.0052 | | | [CVE-2026-16407](https://patchblox.com/security/data/cve/CVE-2026-16407.md) | Urgent | Mitigation bypass in the DOM: Service Workers component | 9.8 | 0.0051 | | | [CVE-2026-16411](https://patchblox.com/security/data/cve/CVE-2026-16411.md) | Urgent | Memory safety bugs fixed in Thunderbird 153 | 9.8 | 0.0049 | | | [CVE-2026-16360](https://patchblox.com/security/data/cve/CVE-2026-16360.md) | Urgent | Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153 | 9.8 | 0.0047 | | | [CVE-2026-16363](https://patchblox.com/security/data/cve/CVE-2026-16363.md) | Urgent | JIT miscompilation in the JavaScript: WebAssembly component | 9.8 | 0.0044 | | | [CVE-2026-16369](https://patchblox.com/security/data/cve/CVE-2026-16369.md) | Urgent | Integer overflow in the JavaScript: WebAssembly component | 9.8 | 0.0044 | | | [CVE-2026-16370](https://patchblox.com/security/data/cve/CVE-2026-16370.md) | Urgent | Mitigation bypass in the DOM: Networking component | 9.1 | 0.0043 | | | [CVE-2026-16394](https://patchblox.com/security/data/cve/CVE-2026-16394.md) | Urgent | Mitigation bypass in the DOM: Security component | 9.1 | 0.0043 | | | [CVE-2026-16406](https://patchblox.com/security/data/cve/CVE-2026-16406.md) | Urgent | Mitigation bypass in the Networking component | 9.1 | 0.0043 | | | [CVE-2026-16364](https://patchblox.com/security/data/cve/CVE-2026-16364.md) | Urgent | Incorrect boundary conditions in the Audio/Video: Playback component | 9.1 | 0.0043 | | | [CVE-2026-16350](https://patchblox.com/security/data/cve/CVE-2026-16350.md) | Urgent | Incorrect boundary conditions in the Audio/Video: cubeb component | 9.8 | 0.0041 | | | [CVE-2026-16355](https://patchblox.com/security/data/cve/CVE-2026-16355.md) | Urgent | JIT miscompilation in the JavaScript Engine: JIT component | 9.8 | 0.0041 | | | [CVE-2026-16351](https://patchblox.com/security/data/cve/CVE-2026-16351.md) | Urgent | Sandbox escape due to use-after-free in the DOM: Navigation component | 9.8 | 0.0039 | | | [CVE-2026-16352](https://patchblox.com/security/data/cve/CVE-2026-16352.md) | Urgent | Sandbox escape due to use-after-free in the Disability Access APIs component | 9.8 | 0.0039 | | | [CVE-2026-16356](https://patchblox.com/security/data/cve/CVE-2026-16356.md) | Urgent | Sandbox escape due to use-after-free in the Disability Access APIs component | 9.8 | 0.0039 | | | [CVE-2026-16368](https://patchblox.com/security/data/cve/CVE-2026-16368.md) | Urgent | Incorrect boundary conditions in the JavaScript: WebAssembly component | 9.8 | 0.0039 | | | [CVE-2026-16377](https://patchblox.com/security/data/cve/CVE-2026-16377.md) | Urgent | Mitigation bypass in the PDF Viewer component | 9.8 | 0.0039 | | | [CVE-2026-16383](https://patchblox.com/security/data/cve/CVE-2026-16383.md) | Urgent | Mitigation bypass in the DOM: Networking component | 9.8 | 0.0039 | | | [CVE-2026-16367](https://patchblox.com/security/data/cve/CVE-2026-16367.md) | Urgent | Sandbox escape due to invalid pointer in the Disability Access APIs component | 10.0 | 0.0038 | | | [CVE-2026-16390](https://patchblox.com/security/data/cve/CVE-2026-16390.md) | Urgent | Mitigation bypass in the Enterprise Policies component | 9.1 | 0.0032 | | | [CVE-2026-16380](https://patchblox.com/security/data/cve/CVE-2026-16380.md) | Urgent | Mitigation bypass in the Networking component | 9.1 | 0.0031 | | | [CVE-2026-16359](https://patchblox.com/security/data/cve/CVE-2026-16359.md) | Urgent | Incorrect boundary conditions in the Audio/Video: GMP component | 9.1 | 0.0026 | | | [CVE-2026-16358](https://patchblox.com/security/data/cve/CVE-2026-16358.md) | Urgent | Site isolation issue in the Graphics: WebRender component | 9.8 | 0.0022 | | | [CVE-2026-16349](https://patchblox.com/security/data/cve/CVE-2026-16349.md) | Urgent | Same-origin policy bypass in the DOM: Navigation component | 9.8 | 0.0022 | | | [CVE-2026-16375](https://patchblox.com/security/data/cve/CVE-2026-16375.md) | Urgent | Site isolation issue in the Networking: HTTP component | 9.8 | 0.0021 | | | [CVE-2026-16387](https://patchblox.com/security/data/cve/CVE-2026-16387.md) | Urgent | Site isolation issue in the Networking component | 9.8 | 0.0020 | | | [CVE-2026-16381](https://patchblox.com/security/data/cve/CVE-2026-16381.md) | Urgent | Same-origin policy bypass in the Networking: DNS component | 9.1 | 0.0017 | | | [CVE-2026-16376](https://patchblox.com/security/data/cve/CVE-2026-16376.md) | High | Denial-of-service in the Graphics: WebGPU component | 7.5 | 0.0052 | | | [CVE-2026-16409](https://patchblox.com/security/data/cve/CVE-2026-16409.md) | High | Invalid pointer in the Security: PSM component | 7.5 | 0.0052 | | | [CVE-2026-16384](https://patchblox.com/security/data/cve/CVE-2026-16384.md) | High | Information disclosure due to uninitialized memory in the Graphics: WebGPU component | 7.5 | 0.0043 | | | [CVE-2026-16385](https://patchblox.com/security/data/cve/CVE-2026-16385.md) | High | Information disclosure due to uninitialized memory in the Graphics: WebGPU component | 7.5 | 0.0043 | | | [CVE-2026-16386](https://patchblox.com/security/data/cve/CVE-2026-16386.md) | High | Information disclosure due to uninitialized memory in the Graphics: WebGPU component | 7.5 | 0.0043 | | | [CVE-2026-16400](https://patchblox.com/security/data/cve/CVE-2026-16400.md) | High | Information disclosure in the DOM: Security component | 7.5 | 0.0043 | | | [CVE-2026-16378](https://patchblox.com/security/data/cve/CVE-2026-16378.md) | High | Other issue in the DOM: Copy & Paste and Drag & Drop component | 7.5 | 0.0042 | | | [CVE-2026-16372](https://patchblox.com/security/data/cve/CVE-2026-16372.md) | High | Privilege escalation in the DOM: Content Processes component | 8.8 | 0.0041 | | | [CVE-2026-16366](https://patchblox.com/security/data/cve/CVE-2026-16366.md) | High | Privilege escalation in the DOM: Navigation component | 8.8 | 0.0040 | | | [CVE-2026-16401](https://patchblox.com/security/data/cve/CVE-2026-16401.md) | High | Privilege escalation in the Data Loss Prevention component | 8.8 | 0.0040 | | | [CVE-2026-16354](https://patchblox.com/security/data/cve/CVE-2026-16354.md) | High | Information disclosure in the Graphics: ImageLib component | 8.8 | 0.0034 | | | [CVE-2026-16374](https://patchblox.com/security/data/cve/CVE-2026-16374.md) | High | Information disclosure in the Framework component in DevTools | 8.8 | 0.0032 | | | [CVE-2026-16391](https://patchblox.com/security/data/cve/CVE-2026-16391.md) | High | Information disclosure in the Storage: IndexedDB component | 8.8 | 0.0032 | | | [CVE-2026-16371](https://patchblox.com/security/data/cve/CVE-2026-16371.md) | High | Privilege escalation in the DOM: Navigation component | 8.8 | 0.0030 | | | [CVE-2026-16362](https://patchblox.com/security/data/cve/CVE-2026-16362.md) | High | Use-after-free in the WebRTC: Audio/Video component | 8.8 | 0.0029 | | | [CVE-2026-16365](https://patchblox.com/security/data/cve/CVE-2026-16365.md) | High | Privilege escalation in the DOM: Workers component | 8.8 | 0.0028 | | | [CVE-2026-16379](https://patchblox.com/security/data/cve/CVE-2026-16379.md) | High | Privilege escalation in the DOM: Content Processes component | 8.8 | 0.0028 | | | [CVE-2026-16405](https://patchblox.com/security/data/cve/CVE-2026-16405.md) | High | Information disclosure in the Networking: WebSockets component | 8.8 | 0.0026 | | | [CVE-2026-16396](https://patchblox.com/security/data/cve/CVE-2026-16396.md) | High | Privilege escalation in WebExtensions | 8.8 | 0.0024 | | | [CVE-2026-16398](https://patchblox.com/security/data/cve/CVE-2026-16398.md) | High | Site isolation issue in the Graphics component | 7.5 | 0.0022 | | | [CVE-2026-16399](https://patchblox.com/security/data/cve/CVE-2026-16399.md) | High | Site isolation issue in the DOM: Navigation component | 7.5 | 0.0022 | | | [CVE-2026-16403](https://patchblox.com/security/data/cve/CVE-2026-16403.md) | Routine | Spoofing issue in the Address Bar component | 6.5 | 0.0035 | | | [CVE-2026-16397](https://patchblox.com/security/data/cve/CVE-2026-16397.md) | Routine | Clickjacking issue in the WebExtensions component in Firefox for Android | 6.5 | 0.0030 | | --- Data as of 2026-11-09T01:18:40Z UTC. 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