MFSA2026-63: Security Vulnerabilities fixed in Thunderbird 152.0.1
Published Jun 30, 2026
·Updated
Security Vulnerabilities fixed in Thunderbird 152.0.1
Affected Software
1 affected componentFixes available
Mozilla Thunderbird<152.0.1
152.0.1
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 152.0.1 - Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 152.0.1
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 MFSA2026-63?
The severity of MFSA2026-63 is classified as high with a score of 7.
2
How do I fix MFSA2026-63?
To fix MFSA2026-63, update your Mozilla Thunderbird to version 152.0.1 or later.
3
What vulnerabilities are addressed in MFSA2026-63?
MFSA2026-63 addresses multiple security vulnerabilities that have been fixed in Thunderbird 152.0.1.
4
When was MFSA2026-63 published?
MFSA2026-63 was published on June 30, 2026.
5
Which software is affected by MFSA2026-63?
The affected software due to MFSA2026-63 is Mozilla Thunderbird.