# Mozilla Thunderbird (en-US) 141.0

Mozilla Thunderbird (en-US) 141.0, released July 22, 2025, fixes 53 CVEs in Mozilla Thunderbird (en-US). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Thunderbird (en-US) is 159.0, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/mozilla.thunderbird-141.0
- Platform: Windows apps
- Released: Jul 22, 2025
- Priority: Urgent (Closes CVE-2025-8044, rated Critical)
- CVEs: 53, exploited: 0, on CISA KEV: 0
- Superseded by: [Mozilla Thunderbird (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-en-us.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Mozilla Thunderbird (en-US)](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-en-us.md) |  | 141.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-8044](https://patchblox.com/security/data/cve/CVE-2025-8044.md) | Urgent | Memory safety bugs fixed in Firefox 141 and Thunderbird 141 | 9.8 | 0.0048 |  |
| [CVE-2025-8043](https://patchblox.com/security/data/cve/CVE-2025-8043.md) | Urgent | Incorrect URL truncation | 9.8 | 0.0043 |  |
| [CVE-2026-16361](https://patchblox.com/security/data/cve/CVE-2026-16361.md) | Urgent | Memory safety bugs fixed in Thunderbird ESR 140.13 | 9.8 | 0.0032 |  |
| [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-2025-8028](https://patchblox.com/security/data/cve/CVE-2025-8028.md) | High | Large branch table could lead to truncated instruction | 9.8 | 0.0058 |  |
| [CVE-2026-8946](https://patchblox.com/security/data/cve/CVE-2026-8946.md) | High | Incorrect boundary conditions in the Audio/Video: Web Codecs component | 7.5 | 0.0056 |  |
| [CVE-2026-8953](https://patchblox.com/security/data/cve/CVE-2026-8953.md) | High | Sandbox escape due to use-after-free in the Disability Access APIs component | 9.6 | 0.0053 |  |
| [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-2025-8031](https://patchblox.com/security/data/cve/CVE-2025-8031.md) | High | Incorrect URL stripping in CSP reports | 9.8 | 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-2026-8091](https://patchblox.com/security/data/cve/CVE-2026-8091.md) | High | Incorrect boundary conditions in the Audio/Video: Playback component | 9.8 | 0.0047 |  |
| [CVE-2026-14899](https://patchblox.com/security/data/cve/CVE-2026-14899.md) | High | Off-by-one out of bounds read in MIME header parser for forwarding | 8.8 | 0.0047 |  |
| [CVE-2025-8034](https://patchblox.com/security/data/cve/CVE-2025-8034.md) | High | Memory safety bugs fixed in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141 | 8.8 | 0.0046 |  |
| [CVE-2026-8094](https://patchblox.com/security/data/cve/CVE-2026-8094.md) | High | Other issue in the WebRTC component | 9.8 | 0.0045 |  |
| [CVE-2025-8036](https://patchblox.com/security/data/cve/CVE-2025-8036.md) | High | DNS rebinding circumvents CORS | 8.1 | 0.0045 |  |
| [CVE-2025-8027](https://patchblox.com/security/data/cve/CVE-2025-8027.md) | High | JavaScript engine only wrote partial return value to stack | 7.5 | 0.0043 |  |
| [CVE-2025-8033](https://patchblox.com/security/data/cve/CVE-2025-8033.md) | High | Incorrect JavaScript state machine for generators | 7.5 | 0.0043 |  |
| [CVE-2026-8954](https://patchblox.com/security/data/cve/CVE-2026-8954.md) | High | Incorrect boundary conditions, integer overflow in the Audio/Video component | 7.5 | 0.0043 |  |
| [CVE-2026-8947](https://patchblox.com/security/data/cve/CVE-2026-8947.md) | High | Use-after-free in the DOM: Bindings (WebIDL) component | 7.5 | 0.0041 |  |
| [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-2025-8035](https://patchblox.com/security/data/cve/CVE-2025-8035.md) | High | Memory safety bugs fixed in Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141 | 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-2025-8029](https://patchblox.com/security/data/cve/CVE-2025-8029.md) | High | javascript: URLs executed on object and embed tags | 8.1 | 0.0038 |  |
| [CVE-2025-8030](https://patchblox.com/security/data/cve/CVE-2025-8030.md) | High | Potential user-assisted code execution in “Copy as cURL” command | 8.1 | 0.0038 |  |
| [CVE-2025-8032](https://patchblox.com/security/data/cve/CVE-2025-8032.md) | High | XSLT documents could bypass CSP | 8.1 | 0.0038 |  |
| [CVE-2025-8040](https://patchblox.com/security/data/cve/CVE-2025-8040.md) | High | Memory safety bugs fixed in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141 | 8.8 | 0.0037 |  |
| [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-2025-8039](https://patchblox.com/security/data/cve/CVE-2025-8039.md) | High | Search terms persisted in URL bar | 8.1 | 0.0034 |  |
| [CVE-2026-12329](https://patchblox.com/security/data/cve/CVE-2026-12329.md) | High | Memory safety bug fixed in Thunderbird ESR 140.12 | 7.5 | 0.0031 |  |
| [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-2026-92021](https://patchblox.com/security/data/cve/CVE-2026-92021.md) | High | Use-after-free in the JavaScript Engine: JIT component | 8.8 | 0.0028 |  |
| [CVE-2025-8038](https://patchblox.com/security/data/cve/CVE-2025-8038.md) | High | CSP frame-src was not correctly enforced for paths | 9.8 | 0.0027 |  |
| [CVE-2025-8037](https://patchblox.com/security/data/cve/CVE-2025-8037.md) | High | Nameless cookies shadow secure cookies | 9.1 | 0.0027 |  |
| [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-2026-92014](https://patchblox.com/security/data/cve/CVE-2026-92014.md) | High | Privilege escalation due to incorrect boundary conditions in the Graphics component | 8.8 | 0.0024 |  |
| [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-2026-12330](https://patchblox.com/security/data/cve/CVE-2026-12330.md) | High | Incorrect boundary conditions in the Internationalization component | 7.5 | 0.0016 |  |
| [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 |  |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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