# Mozilla Firefox (en-US) 156.0 Mozilla Firefox (en-US) 156.0, released September 15, 2026, fixes 72 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-156.0 - Platform: Windows apps - Released: Sep 15, 2026 - Priority: Urgent (Closes CVE-2026-92066, rated Critical) - CVEs: 72, exploited: 0, on CISA KEV: 0 - Superseded by: [Mozilla Firefox (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md), the latest version, which also fixes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) | | 156.0 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-92036](https://patchblox.com/security/data/cve/CVE-2026-92036.md) | Urgent | Incorrect boundary conditions in the Networking: HTTP component | 9.8 | 0.0055 | | | [CVE-2026-92037](https://patchblox.com/security/data/cve/CVE-2026-92037.md) | Urgent | Incorrect boundary conditions in the DOM: Animation component | 9.8 | 0.0055 | | | [CVE-2026-92061](https://patchblox.com/security/data/cve/CVE-2026-92061.md) | Urgent | Incorrect boundary conditions in the Security: Process Sandboxing component | 9.8 | 0.0055 | | | [CVE-2026-92066](https://patchblox.com/security/data/cve/CVE-2026-92066.md) | Urgent | Sandbox escape in the Profile Backup component | 9.8 | 0.0055 | | | [CVE-2026-92051](https://patchblox.com/security/data/cve/CVE-2026-92051.md) | Urgent | Spoofing issue due to invalid pointer in the Graphics component | 9.1 | 0.0053 | | | [CVE-2026-92050](https://patchblox.com/security/data/cve/CVE-2026-92050.md) | Urgent | Sandbox escape due to race condition in the XPConnect component | 9.1 | 0.0041 | | | [CVE-2026-92018](https://patchblox.com/security/data/cve/CVE-2026-92018.md) | Urgent | Sandbox escape in the DOM: Core & HTML component | 9.6 | 0.0033 | | | [CVE-2026-92032](https://patchblox.com/security/data/cve/CVE-2026-92032.md) | Urgent | Sandbox escape due to invalid pointer in the Graphics component | 9.6 | 0.0032 | | | [CVE-2026-92038](https://patchblox.com/security/data/cve/CVE-2026-92038.md) | Urgent | Mitigation bypass in the Remote Settings Client component | 9.1 | 0.0032 | | | [CVE-2026-92041](https://patchblox.com/security/data/cve/CVE-2026-92041.md) | Urgent | Mitigation bypass in the DOM: Networking component | 9.1 | 0.0032 | | | [CVE-2026-92075](https://patchblox.com/security/data/cve/CVE-2026-92075.md) | Urgent | Mitigation bypass in the Networking component | 9.1 | 0.0032 | | | [CVE-2026-92045](https://patchblox.com/security/data/cve/CVE-2026-92045.md) | Urgent | Sandbox escape due to incorrect boundary conditions in the WebRTC component | 9.6 | 0.0030 | | | [CVE-2026-92048](https://patchblox.com/security/data/cve/CVE-2026-92048.md) | Urgent | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | 9.0 | 0.0028 | | | [CVE-2026-92034](https://patchblox.com/security/data/cve/CVE-2026-92034.md) | Urgent | Site isolation issue in the Graphics component | 9.1 | 0.0027 | | | [CVE-2026-92057](https://patchblox.com/security/data/cve/CVE-2026-92057.md) | Urgent | Mitigation bypass in the Enterprise Policies component | 9.1 | 0.0025 | | | [CVE-2026-92079](https://patchblox.com/security/data/cve/CVE-2026-92079.md) | Urgent | Mitigation bypass in the Widget: Win32 component | 9.1 | 0.0025 | | | [CVE-2026-92071](https://patchblox.com/security/data/cve/CVE-2026-92071.md) | Urgent | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | 9.6 | 0.0024 | | | [CVE-2026-92059](https://patchblox.com/security/data/cve/CVE-2026-92059.md) | Urgent | Incorrect boundary conditions in the DOM: Editor component | 9.3 | 0.0011 | | | [CVE-2026-92040](https://patchblox.com/security/data/cve/CVE-2026-92040.md) | High | Use-after-free in the JavaScript: WebAssembly component | 8.8 | 0.0042 | | | [CVE-2026-92005](https://patchblox.com/security/data/cve/CVE-2026-92005.md) | High | Use-after-free in the Audio/Video: Web Codecs component | 7.5 | 0.0036 | | | [CVE-2026-92035](https://patchblox.com/security/data/cve/CVE-2026-92035.md) | High | Sandbox escape due to incorrect boundary conditions in the Graphics component | 9.6 | 0.0033 | | | [CVE-2026-92006](https://patchblox.com/security/data/cve/CVE-2026-92006.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0033 | | | [CVE-2026-92044](https://patchblox.com/security/data/cve/CVE-2026-92044.md) | High | Information disclosure in the Networking: HTTP component | 7.5 | 0.0032 | | | [CVE-2026-92022](https://patchblox.com/security/data/cve/CVE-2026-92022.md) | High | Use-after-free in the DOM: HTML Parser component | 8.8 | 0.0032 | | | [CVE-2026-92023](https://patchblox.com/security/data/cve/CVE-2026-92023.md) | High | Use-after-free in the XML component | 8.8 | 0.0032 | | | [CVE-2026-92024](https://patchblox.com/security/data/cve/CVE-2026-92024.md) | High | Use-after-free in the SVG component | 8.8 | 0.0032 | | | [CVE-2026-92025](https://patchblox.com/security/data/cve/CVE-2026-92025.md) | High | Use-after-free in the DOM: Navigation component | 8.8 | 0.0032 | | | [CVE-2026-92027](https://patchblox.com/security/data/cve/CVE-2026-92027.md) | High | Use-after-free in the DOM: Streams component | 8.8 | 0.0032 | | | [CVE-2026-92028](https://patchblox.com/security/data/cve/CVE-2026-92028.md) | High | Use-after-free in the DOM: Core & HTML component | 8.8 | 0.0032 | | | [CVE-2026-92029](https://patchblox.com/security/data/cve/CVE-2026-92029.md) | High | Use-after-free in the SVG component | 8.8 | 0.0032 | | | [CVE-2026-92016](https://patchblox.com/security/data/cve/CVE-2026-92016.md) | High | Use-after-free in the Disability Access APIs component | 8.8 | 0.0031 | | | [CVE-2026-92026](https://patchblox.com/security/data/cve/CVE-2026-92026.md) | High | Use-after-free in the Networking component | 8.8 | 0.0031 | | | [CVE-2026-92019](https://patchblox.com/security/data/cve/CVE-2026-92019.md) | High | Mitigation bypass in the Remote Settings Client component | 8.1 | 0.0031 | | | [CVE-2026-92031](https://patchblox.com/security/data/cve/CVE-2026-92031.md) | High | Information disclosure in the Graphics: ImageLib component | 7.5 | 0.0031 | | | [CVE-2026-92046](https://patchblox.com/security/data/cve/CVE-2026-92046.md) | High | Use-after-free in the Graphics component | 8.8 | 0.0029 | | | [CVE-2026-92015](https://patchblox.com/security/data/cve/CVE-2026-92015.md) | High | Privilege escalation in the WebExtensions component | 8.8 | 0.0026 | | | [CVE-2026-92007](https://patchblox.com/security/data/cve/CVE-2026-92007.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92008](https://patchblox.com/security/data/cve/CVE-2026-92008.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92009](https://patchblox.com/security/data/cve/CVE-2026-92009.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92010](https://patchblox.com/security/data/cve/CVE-2026-92010.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92011](https://patchblox.com/security/data/cve/CVE-2026-92011.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92012](https://patchblox.com/security/data/cve/CVE-2026-92012.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92013](https://patchblox.com/security/data/cve/CVE-2026-92013.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0026 | | | [CVE-2026-92020](https://patchblox.com/security/data/cve/CVE-2026-92020.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component | 8.8 | 0.0026 | | | [CVE-2026-92053](https://patchblox.com/security/data/cve/CVE-2026-92053.md) | High | Privilege escalation in the Graphics: CanvasWebGL component | 8.8 | 0.0025 | | | [CVE-2026-92054](https://patchblox.com/security/data/cve/CVE-2026-92054.md) | High | Privilege escalation in the Memory component | 8.8 | 0.0024 | | | [CVE-2026-92017](https://patchblox.com/security/data/cve/CVE-2026-92017.md) | High | Privilege escalation in the DOM: Service Workers component | 8.8 | 0.0024 | | | [CVE-2026-92043](https://patchblox.com/security/data/cve/CVE-2026-92043.md) | High | Privilege escalation due to incorrect boundary conditions in the Audio/Video component | 8.8 | 0.0024 | | | [CVE-2026-92052](https://patchblox.com/security/data/cve/CVE-2026-92052.md) | High | Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component | 8.8 | 0.0024 | | | [CVE-2026-92049](https://patchblox.com/security/data/cve/CVE-2026-92049.md) | High | Use-after-free in the Widget: Win32 component | 8.8 | 0.0023 | | | [CVE-2026-92056](https://patchblox.com/security/data/cve/CVE-2026-92056.md) | High | Use-after-free in the Graphics: Text component | 8.8 | 0.0023 | | | [CVE-2026-92058](https://patchblox.com/security/data/cve/CVE-2026-92058.md) | High | Use-after-free in the Graphics component | 8.8 | 0.0023 | | | [CVE-2026-92060](https://patchblox.com/security/data/cve/CVE-2026-92060.md) | High | Use-after-free in the Internationalization component | 8.8 | 0.0023 | | | [CVE-2026-92067](https://patchblox.com/security/data/cve/CVE-2026-92067.md) | High | Use-after-free in the Widget: Gtk component | 8.8 | 0.0023 | | | [CVE-2026-92055](https://patchblox.com/security/data/cve/CVE-2026-92055.md) | High | Privilege escalation in the DevTools component | 8.8 | 0.0023 | | | [CVE-2026-92072](https://patchblox.com/security/data/cve/CVE-2026-92072.md) | High | Incorrect boundary conditions in the Safe Browsing component | 8.0 | 0.0023 | | | [CVE-2026-92042](https://patchblox.com/security/data/cve/CVE-2026-92042.md) | High | Race condition in the DOM: Content Processes component | 7.5 | 0.0022 | | | [CVE-2026-92047](https://patchblox.com/security/data/cve/CVE-2026-92047.md) | High | Privilege escalation in the Crash Reporting component | 8.8 | 0.0022 | | | [CVE-2026-92062](https://patchblox.com/security/data/cve/CVE-2026-92062.md) | High | Privilege escalation in the Session Restore component | 8.8 | 0.0022 | | | [CVE-2026-92073](https://patchblox.com/security/data/cve/CVE-2026-92073.md) | High | Privilege escalation in the Enterprise Policies component | 8.8 | 0.0022 | | | [CVE-2026-92030](https://patchblox.com/security/data/cve/CVE-2026-92030.md) | High | Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component | 7.5 | 0.0022 | | | [CVE-2026-92074](https://patchblox.com/security/data/cve/CVE-2026-92074.md) | High | Mitigation bypass in the Popup Blocker component | 8.8 | 0.0011 | | | [CVE-2026-92076](https://patchblox.com/security/data/cve/CVE-2026-92076.md) | High | Incorrect boundary conditions in the Networking component | 8.8 | 0.0011 | | | [CVE-2026-92064](https://patchblox.com/security/data/cve/CVE-2026-92064.md) | High | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | 8.8 | 0.0010 | | | [CVE-2026-92065](https://patchblox.com/security/data/cve/CVE-2026-92065.md) | High | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | 8.8 | 0.0010 | | | [CVE-2026-92063](https://patchblox.com/security/data/cve/CVE-2026-92063.md) | Routine | Denial-of-service in the Audio/Video component | 6.5 | 0.0038 | | | [CVE-2026-92077](https://patchblox.com/security/data/cve/CVE-2026-92077.md) | Routine | Denial-of-service in the SVG component | 6.5 | 0.0027 | | | [CVE-2026-92078](https://patchblox.com/security/data/cve/CVE-2026-92078.md) | Routine | Denial-of-service in the Security component | 6.5 | 0.0022 | | | [CVE-2026-92039](https://patchblox.com/security/data/cve/CVE-2026-92039.md) | Routine | Mitigation bypass in the DOM: Notifications component | 6.3 | 0.0020 | | | [CVE-2026-92070](https://patchblox.com/security/data/cve/CVE-2026-92070.md) | Routine | Information disclosure in the Networking component | 4.3 | 0.0019 | | | [CVE-2026-92069](https://patchblox.com/security/data/cve/CVE-2026-92069.md) | Routine | Spoofing issue in the DOM: Navigation component | 5.4 | 0.0018 | | | [CVE-2026-92068](https://patchblox.com/security/data/cve/CVE-2026-92068.md) | Routine | Site isolation issue in the Reader Mode component | 5.4 | 0.0011 | | --- Data as of 2026-11-09T07:25:28Z UTC. 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