MFSA2026-71: Security Vulnerabilities fixed in Thunderbird 153

Published Jul 21, 2026
·
Updated

Security Vulnerabilities fixed in Thunderbird 153

Affected Software

1 affected componentFixes available
Mozilla Thunderbird<153
153

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 153

Event History

Jul 21, 2026
Advisory Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of MFSA2026-71?

The severity of MFSA2026-71 is high, rated at 7.

2

How do I fix MFSA2026-71?

To fix MFSA2026-71, update to Thunderbird version 153 or later.

3

What security vulnerabilities are addressed in MFSA2026-71?

MFSA2026-71 addresses multiple security vulnerabilities that have been fixed in Thunderbird 153.

4

When was MFSA2026-71 published?

MFSA2026-71 was published on July 21, 2026.

5

Which software is affected by MFSA2026-71?

MFSA2026-71 affects Mozilla Thunderbird.

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