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Mozilla Thunderbird Beta (MSIX)

by Mozillav148.0.6

Last updated

A free and open source email, newsfeed, chat, and calendaring client that is easy to set up.

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Install with winget

$ winget install --id Mozilla.Thunderbird.Beta.MSIX --exact --version 148.0.6

Run in Command Prompt, PowerShell, or Windows Terminal. Prompts for any agreements.

Silent install command for Mozilla Thunderbird Beta (MSIX)

Mozilla Thunderbird Beta (MSIX) uses MSIX. The silent install switches are (no switches needed).

One-line silent install (x64)
Add-AppxPackage -Path .\Thunderbird%20Setup%20148.0b6.msix

See the full silent install reference for Mozilla Thunderbird Beta (MSIX) →

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Installers · v148.0.6

ArchitectureTypeScopeInstallDownload
x64MSIX-Direct

Copy a command tailored to that specific architecture, type, and scope - useful when winget would otherwise pick a different default.

Security

25 known CVEs via NVD

  • high7.5Fix in v153.2.0CVE-2026-84642affects before 153.2.0, 155.0Sep 1, 2026

    The values of the mail.allowed_attachment_hostnames advanced config setting were used in a regular expression without escaping. For some possible valid hostnames, this could allow certain unintended hostnames to also match and serve remote attachments. This vulnerability was fix...

    Vendor advisory
  • high7.5Fix in v153.2.0CVE-2026-84641affects before 140.15.0, 153.2.0, 155.0Sep 1, 2026

    A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents can ultimately be persisted to prefs.js. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

    Vendor advisory
  • high7.5Fix in v153.2.0CVE-2026-84640affects before 140.15.0, 153.2.0, 155.0Sep 1, 2026

    A maliciously constructed mail header could lead to a one byte read past the end of a buffer. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

    Vendor advisory
  • critical9.1Fix in v153.2.0CVE-2026-84639affects before 140.15.0, 153.2.0, 155.0Sep 1, 2026

    Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

    Vendor advisory
  • critical9.8Fix in v153.2.0CVE-2026-84637affects before 153.2.0, 155.0Sep 1, 2026

    Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypassing Thunderbird's normal executable attachment protections. With the new invitation display enabled, the attachment could also appear under a misleading...

    Vendor advisory
  • high7.5Fix in v153.2.0CVE-2026-84145affects before 140.15.0, 153.2.0, 155.0Sep 1, 2026

    Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vu...

    Vendor advisory
  • high7.5Fix in v153.2.0CVE-2026-84144affects before 153.2.0, 155.0Sep 1, 2026

    Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in...

    Vendor advisory
  • critical9.8Fix in v153.2.0CVE-2026-84143affects before 140.15.0, 153.2.0, 155.0Sep 1, 2026

    Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vu...

    Vendor advisory
Showing 8 of 25. Source: NVD, updated 5h ago. Patch status is best-effort: NVD's fix version is compared against the latest version in winget, but the two version formats don't always align. Confirm with the vendor advisory before treating any specific build as safe.

See a CVE that affects your fleet? Push the patched version to Intune in one click with Pckgr - automated patching is the only way to keep up.

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More from Mozilla or browse calendar, elementio, email.

Frequently asked questions

How do I install Mozilla Thunderbird Beta (MSIX) on Windows?
Open Windows Terminal, PowerShell, or Command Prompt and run: winget install --id Mozilla.Thunderbird.Beta.MSIX --exact --version 148.0.6. winget downloads the installer from Mozilla and runs it. Requires Windows 10 (1809+) or Windows 11.
How do I install Mozilla Thunderbird Beta (MSIX) silently for unattended deployment?
Add --silent and accept the agreements upfront: winget install --id Mozilla.Thunderbird.Beta.MSIX --exact 148.0.6 --silent --accept-package-agreements --accept-source-agreements. This is the variant Intune, Configuration Manager, and other deployment tools should use.
What are the silent install switches for Mozilla Thunderbird Beta (MSIX)?
Mozilla Thunderbird Beta (MSIX) uses MSIX. MSIX packages install silently by default - no switches are needed (Add-AppxPackage -Path .\Thunderbird%20Setup%20148.0b6.msix).
How do I uninstall Mozilla Thunderbird Beta (MSIX) via winget?
Run: winget uninstall --id Mozilla.Thunderbird.Beta.MSIX --exact. Add --silent for unattended uninstalls. winget will use the registered uninstaller from Mozilla Thunderbird Beta (MSIX)'s Apps & Features entry.
Is Mozilla Thunderbird Beta (MSIX) free?
Mozilla Thunderbird Beta (MSIX) is distributed under MPL-2.0. Refer to the publisher (https://support.mozilla.org/kb/thunderbird-beta) for the full license terms - Wingetly itself does not charge for installation.
Does Mozilla Thunderbird Beta (MSIX) work on Windows 10?
Yes, as long as your Windows 10 build supports winget (1809 or newer). winget ships with App Installer on Windows 10/11 and pulls Mozilla Thunderbird Beta (MSIX) directly from the publisher.
How do I keep Mozilla Thunderbird Beta (MSIX) up to date?
Run winget upgrade --id Mozilla.Thunderbird.Beta.MSIX --exact, or winget upgrade --all to update everything winget tracks. We index 1 version of Mozilla Thunderbird Beta (MSIX) from microsoft/winget-pkgs.