# Mozilla Thunderbird (en-US) 91.6.0

Mozilla Thunderbird (en-US) 91.6.0, released February 8, 2022, fixes 8 CVEs in Mozilla Thunderbird (en-US). None of them is reported as exploited. Patch Radar priority: High. 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-91.6.0
- Platform: Windows apps
- Released: Feb 8, 2022
- Priority: High (Closes CVE-2022-22756, high severity)
- CVEs: 8, 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- Superseded by: [Mozilla Thunderbird (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-en-us.md), the latest version, which also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) |  | 91.6.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-22756](https://patchblox.com/security/data/cve/CVE-2022-22756.md) | High | Mozilla Firefox ESR and 4 others: Improper Control of Generation of Code ('Code Injection') | 9.6 | 0.0096 |  |
| [CVE-2022-22760](https://patchblox.com/security/data/cve/CVE-2022-22760.md) | High | Mozilla Firefox ESR and 4 others: Generation of Error Message Containing Sensitive Information | 9.6 | 0.0081 |  |
| [CVE-2022-22759](https://patchblox.com/security/data/cve/CVE-2022-22759.md) | High | Mozilla Firefox ESR and 4 others: Protection Mechanism Failure | 9.6 | 0.0079 |  |
| [CVE-2022-22761](https://patchblox.com/security/data/cve/CVE-2022-22761.md) | High | Mozilla Firefox ESR and 4 others: Protection Mechanism Failure | 9.6 | 0.0079 |  |
| [CVE-2022-22764](https://patchblox.com/security/data/cve/CVE-2022-22764.md) | High | Mozilla Firefox ESR and 4 others: Out-of-bounds Write | 9.6 | 0.0075 |  |
| [CVE-2022-22754](https://patchblox.com/security/data/cve/CVE-2022-22754.md) | High | Mozilla Firefox ESR and 4 others: Incorrect Authorization | 9.6 | 0.0067 |  |
| [CVE-2022-22753](https://patchblox.com/security/data/cve/CVE-2022-22753.md) | High | Mozilla Firefox ESR and 4 others: Time-of-check Time-of-use (TOCTOU) Race Condition | 7.1 | 0.0065 |  |
| [CVE-2022-22763](https://patchblox.com/security/data/cve/CVE-2022-22763.md) | High | Mozilla Firefox ESR and 3 others: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') | 9.6 | 0.0060 |  |

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Data as of 2026-11-10T07:50:38Z 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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