MFSA2026-64: Security Vulnerabilities fixed in Thunderbird 140.12.1
Published Jun 30, 2026
·Updated
Security Vulnerabilities fixed in Thunderbird 140.12.1
Affected Software
1 affected componentFixes available
Mozilla Thunderbird<140.12.1
140.12.1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 140.12.1
Event History
Jun 30, 2026
Advisory Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of MFSA2026-64?
The severity of MFSA2026-64 is rated as high with a score of 7.
2
What vulnerabilities are addressed in MFSA2026-64?
MFSA2026-64 addresses multiple security vulnerabilities in Mozilla Thunderbird version 140.12.1.
3
How do I fix MFSA2026-64?
To fix MFSA2026-64, update your Mozilla Thunderbird to version 140.12.1 or later.
4
When was MFSA2026-64 published?
MFSA2026-64 was published on June 30, 2026.
5
What software is affected by MFSA2026-64?
MFSA2026-64 affects Mozilla Thunderbird.