MFSA2026-11: Security Vulnerabilities fixed in Thunderbird 147.0.2 and 140.7.2
Published Feb 16, 2026
·Updated
Security Vulnerabilities fixed in Thunderbird 147.0.2 and 140.7.2
Affected Software
2 affected componentsFixes available
Mozilla Thunderbird<140.7.2
140.7.2
Mozilla Thunderbird<147.0.2
147.0.2
Event History
Feb 16, 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 MFSA2026-11?
The severity of MFSA2026-11 is classified as high due to multiple security vulnerabilities that could potentially be exploited.
2
How do I fix MFSA2026-11?
To fix MFSA2026-11, update Thunderbird to version 147.0.2 or 140.7.2 immediately.
3
What vulnerabilities are addressed in MFSA2026-11?
MFSA2026-11 addresses several security vulnerabilities that could lead to information disclosure and potential account compromises.
4
What versions of Thunderbird are impacted by MFSA2026-11?
Thunderbird versions prior to 147.0.2 and 140.7.2 are impacted by MFSA2026-11.
5
Is it safe to use Thunderbird after applying the update for MFSA2026-11?
Yes, it is safe to use Thunderbird after applying the update that addresses the vulnerabilities outlined in MFSA2026-11.