# Mozilla Thunderbird security updates

The latest version of Mozilla Thunderbird is 159.0, released October 26, 2026. Patch Radar has 8 security fixes for Mozilla Thunderbird, closing 358 CVEs. The newest security fix is Mozilla Thunderbird 157.0, released September 28, 2026. Version 159.0 adds no new CVE fixes and includes all of them.

- Web page: https://patchblox.com/security/product/macos/mozilla-thunderbird
- Platform: macOS
- Vendor: Mozilla
- Latest version: 159.0 (Oct 26, 2026)
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| Mozilla Thunderbird 159.0 (latest, includes every fix below) | Oct 26, 2026 | 159.0 |  |  |  |
| [Mozilla Thunderbird 157.0](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-157.0.md) | Sep 28, 2026 | 157.0 | Urgent | 76 | 0 |
| [Mozilla Thunderbird 156.0](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-156.0.md) | Sep 10, 2026 | 156.0 | Urgent | 73 | 0 |
| [Mozilla Thunderbird 155.0](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-155.0.md) | Aug 28, 2026 | 155.0 | Urgent | 31 | 0 |
| [Mozilla Thunderbird 154.0](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-154.0.md) | Aug 17, 2026 | 154.0 | Urgent | 56 | 0 |
| [Mozilla Thunderbird 153.0](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-153.0.md) | Jul 16, 2026 | 153.0 | Urgent | 53 | 0 |
| [Mozilla Thunderbird 152.0.1](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-152.0.1.md) | Jun 30, 2026 | 152.0.1 | Routine | 2 | 0 |
| [Mozilla Thunderbird 152.0](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-152.0.md) | Jun 11, 2026 | 152.0 | Urgent | 40 | 0 |
| [Mozilla Thunderbird 151.0.1](https://patchblox.com/security/data/fix/macos/org.mozilla.thunderbird-151.0.1.md) | May 22, 2026 | 151.0.1 | Urgent | 27 | 0 |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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