# Mozilla Firefox (en-US) 150.0 Mozilla Firefox (en-US) 150.0, released April 21, 2026, fixes 42 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-150.0 - Platform: Windows apps - Released: Apr 21, 2026 - Priority: Urgent (Closes CVE-2026-6768, rated Critical) - CVEs: 42, exploited: 0, on CISA KEV: 0 - Superseded by: [Mozilla Firefox (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md), the latest version, which also fixes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) | | 150.0 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-6768](https://patchblox.com/security/data/cve/CVE-2026-6768.md) | Urgent | Mitigation bypass in the Networking: Cookies component | 9.8 | 0.0029 | | | [CVE-2026-6760](https://patchblox.com/security/data/cve/CVE-2026-6760.md) | Urgent | Mitigation bypass in the Networking: Cookies component | 9.8 | 0.0028 | | | [CVE-2026-6770](https://patchblox.com/security/data/cve/CVE-2026-6770.md) | High | Other issue in the Storage: IndexedDB component | 8.8 | 0.0388 | | | [CVE-2026-6746](https://patchblox.com/security/data/cve/CVE-2026-6746.md) | High | Use-after-free in the DOM: Core & HTML component | 8.8 | 0.0095 | | | [CVE-2026-6758](https://patchblox.com/security/data/cve/CVE-2026-6758.md) | High | Use-after-free in the JavaScript: WebAssembly component | 7.5 | 0.0081 | | | [CVE-2026-6785](https://patchblox.com/security/data/cve/CVE-2026-6785.md) | High | Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 | 8.8 | 0.0051 | | | [CVE-2026-6786](https://patchblox.com/security/data/cve/CVE-2026-6786.md) | High | Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 | 8.8 | 0.0050 | | | [CVE-2026-6757](https://patchblox.com/security/data/cve/CVE-2026-6757.md) | High | Invalid pointer in the JavaScript: WebAssembly component | 8.8 | 0.0049 | | | [CVE-2026-6750](https://patchblox.com/security/data/cve/CVE-2026-6750.md) | High | Privilege escalation in the Graphics: WebRender component | 8.8 | 0.0048 | | | [CVE-2026-6749](https://patchblox.com/security/data/cve/CVE-2026-6749.md) | High | Information disclosure due to uninitialized memory in the Graphics: Canvas2D component | 8.8 | 0.0040 | | | [CVE-2026-6747](https://patchblox.com/security/data/cve/CVE-2026-6747.md) | High | Use-after-free in the WebRTC component | 8.8 | 0.0040 | | | [CVE-2026-6748](https://patchblox.com/security/data/cve/CVE-2026-6748.md) | High | Uninitialized memory in the Audio/Video: Web Codecs component | 9.8 | 0.0040 | | | [CVE-2026-6772](https://patchblox.com/security/data/cve/CVE-2026-6772.md) | High | Incorrect boundary conditions in the Libraries component in NSS | 8.8 | 0.0039 | | | [CVE-2026-6754](https://patchblox.com/security/data/cve/CVE-2026-6754.md) | High | Use-after-free in the JavaScript Engine component | 8.8 | 0.0039 | | | [CVE-2026-6759](https://patchblox.com/security/data/cve/CVE-2026-6759.md) | High | Use-after-free in the Widget: Cocoa component | 8.8 | 0.0036 | | | [CVE-2026-6784](https://patchblox.com/security/data/cve/CVE-2026-6784.md) | High | Memory safety bugs fixed in Firefox 150 and Thunderbird 150 | 7.5 | 0.0036 | | | [CVE-2026-6773](https://patchblox.com/security/data/cve/CVE-2026-6773.md) | High | Denial-of-service due to integer overflow in the Graphics: WebGPU component | 7.5 | 0.0032 | | | [CVE-2026-6771](https://patchblox.com/security/data/cve/CVE-2026-6771.md) | High | Mitigation bypass in the DOM: Security component | 9.8 | 0.0031 | | | [CVE-2026-6751](https://patchblox.com/security/data/cve/CVE-2026-6751.md) | High | Uninitialized memory in the Audio/Video: Web Codecs component | 8.8 | 0.0031 | | | [CVE-2026-6752](https://patchblox.com/security/data/cve/CVE-2026-6752.md) | High | Incorrect boundary conditions in the WebRTC component | 8.8 | 0.0031 | | | [CVE-2026-6753](https://patchblox.com/security/data/cve/CVE-2026-6753.md) | High | Incorrect boundary conditions in the WebRTC component | 8.8 | 0.0031 | | | [CVE-2026-6780](https://patchblox.com/security/data/cve/CVE-2026-6780.md) | High | Denial-of-service in the Audio/Video: Playback component | 7.5 | 0.0029 | | | [CVE-2026-6781](https://patchblox.com/security/data/cve/CVE-2026-6781.md) | High | Denial-of-service in the Audio/Video: Playback component | 7.5 | 0.0029 | | | [CVE-2026-6756](https://patchblox.com/security/data/cve/CVE-2026-6756.md) | High | Mitigation bypass in Firefox for Android | 7.5 | 0.0027 | | | [CVE-2026-7321](https://patchblox.com/security/data/cve/CVE-2026-7321.md) | High | Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component | 9.6 | 0.0026 | | | [CVE-2026-6766](https://patchblox.com/security/data/cve/CVE-2026-6766.md) | High | Incorrect boundary conditions in the Libraries component in NSS | 8.8 | 0.0026 | | | [CVE-2026-6782](https://patchblox.com/security/data/cve/CVE-2026-6782.md) | High | Information disclosure in the IP Protection component | 7.5 | 0.0025 | | | [CVE-2026-6764](https://patchblox.com/security/data/cve/CVE-2026-6764.md) | High | Incorrect boundary conditions in the DOM: Device Interfaces component | 8.8 | 0.0023 | | | [CVE-2026-6767](https://patchblox.com/security/data/cve/CVE-2026-6767.md) | High | Other issue in the Libraries component in NSS | 8.8 | 0.0023 | | | [CVE-2026-6769](https://patchblox.com/security/data/cve/CVE-2026-6769.md) | High | Privilege escalation in the Debugger component | 8.8 | 0.0023 | | | [CVE-2026-6761](https://patchblox.com/security/data/cve/CVE-2026-6761.md) | High | Privilege escalation in the Networking component | 8.8 | 0.0022 | | | [CVE-2026-6765](https://patchblox.com/security/data/cve/CVE-2026-6765.md) | High | Information disclosure in the Form Autofill component | 8.8 | 0.0022 | | | [CVE-2026-6763](https://patchblox.com/security/data/cve/CVE-2026-6763.md) | High | Mitigation bypass in the File Handling component | 8.8 | 0.0019 | | | [CVE-2026-6762](https://patchblox.com/security/data/cve/CVE-2026-6762.md) | High | Spoofing issue in the DOM: Core & HTML component | 8.8 | 0.0019 | | | [CVE-2026-6776](https://patchblox.com/security/data/cve/CVE-2026-6776.md) | High | Incorrect boundary conditions in the WebRTC: Networking component | 8.8 | 0.0011 | | | [CVE-2026-6778](https://patchblox.com/security/data/cve/CVE-2026-6778.md) | Routine | Invalid pointer in the Audio/Video: Playback component | 5.3 | 0.0026 | | | [CVE-2026-6755](https://patchblox.com/security/data/cve/CVE-2026-6755.md) | Routine | Mitigation bypass in the DOM: postMessage component | 6.5 | 0.0025 | | | [CVE-2026-6783](https://patchblox.com/security/data/cve/CVE-2026-6783.md) | Routine | Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component | 5.3 | 0.0023 | | | [CVE-2026-6775](https://patchblox.com/security/data/cve/CVE-2026-6775.md) | Routine | Incorrect boundary conditions in the WebRTC component | 5.3 | 0.0021 | | | [CVE-2026-6779](https://patchblox.com/security/data/cve/CVE-2026-6779.md) | Routine | Other issue in the JavaScript Engine component | 5.3 | 0.0021 | | | [CVE-2026-6777](https://patchblox.com/security/data/cve/CVE-2026-6777.md) | Routine | Other issue in the Networking: DNS component | 5.3 | 0.0016 | | | [CVE-2026-6774](https://patchblox.com/security/data/cve/CVE-2026-6774.md) | Routine | Mitigation bypass in the DOM: Security component | 5.4 | 0.0015 | | --- Data as of 2026-11-09T01:18:40Z UTC. 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