# Mozilla Thunderbird ESR (ar) 128.8.0

Mozilla Thunderbird ESR (ar) 128.8.0, released March 5, 2025, fixes 10 CVEs in Mozilla Thunderbird ESR (ar). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird ESR (ar) is 153.7.0, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/mozilla.thunderbird.esr.ar-128.8.0
- Platform: Windows apps
- Released: Mar 5, 2025
- Priority: High (Closes CVE-2025-1937, high severity)
- CVEs: 10, exploited: 0, on CISA KEV: 0
- Superseded by: [Mozilla Thunderbird ESR (ar) 153.7.0](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-esr-ar.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Mozilla Thunderbird ESR (ar)](https://patchblox.com/security/data/product/windows-app/mozilla-thunderbird-esr-ar.md) |  | 128.8.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-1937](https://patchblox.com/security/data/cve/CVE-2025-1937.md) | High | Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 | 8.8 | 0.0056 |  |
| [CVE-2025-1931](https://patchblox.com/security/data/cve/CVE-2025-1931.md) | High | Use-after-free in WebTransportChild | 8.8 | 0.0054 |  |
| [CVE-2025-3030](https://patchblox.com/security/data/cve/CVE-2025-3030.md) | High | Memory safety bugs fixed in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9 | 8.8 | 0.0051 |  |
| [CVE-2025-1934](https://patchblox.com/security/data/cve/CVE-2025-1934.md) | High | Unexpected GC during RegExp bailout processing | 8.8 | 0.0045 |  |
| [CVE-2025-1936](https://patchblox.com/security/data/cve/CVE-2025-1936.md) | High | Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents | 8.8 | 0.0045 |  |
| [CVE-2025-1932](https://patchblox.com/security/data/cve/CVE-2025-1932.md) | High | Inconsistent comparator in XSLT sorting led to out-of-bounds access | 8.8 | 0.0042 |  |
| [CVE-2025-26696](https://patchblox.com/security/data/cve/CVE-2025-26696.md) | High | Crafted email message incorrectly shown as being encrypted | 7.0 | 0.0036 |  |
| [CVE-2025-1935](https://patchblox.com/security/data/cve/CVE-2025-1935.md) | High | Clickjacking the registerProtocolHandler info-bar | 8.8 | 0.0034 |  |
| [CVE-2025-1933](https://patchblox.com/security/data/cve/CVE-2025-1933.md) | High | JIT corruption of WASM i32 return values on 64-bit CPUs | 8.8 | 0.0032 |  |
| [CVE-2025-26695](https://patchblox.com/security/data/cve/CVE-2025-26695.md) | Routine | Downloading of OpenPGP keys from WKD used incorrect padding | 5.3 | 0.0016 |  |

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Data as of 2026-11-11T19:49:26Z 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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