MFSA2026-39: Security Vulnerabilities fixed in Thunderbird 140.10.1
Published Apr 30, 2026
·Updated
Security Vulnerabilities fixed in Thunderbird 140.10.1
Affected Software
1 affected componentFixes available
Mozilla Thunderbird<140.10.1
140.10.1
Event History
Apr 30, 2026
Advisory Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
1
What is the severity of MFSA2026-39?
The severity of MFSA2026-39 is classified as important, addressing critical security vulnerabilities in Thunderbird.
2
How do I fix MFSA2026-39?
To fix MFSA2026-39, update to Thunderbird version 140.10.1 or later.
3
What vulnerabilities are addressed in MFSA2026-39?
MFSA2026-39 addresses multiple security vulnerabilities that could potentially be exploited by attackers.
4
Who is affected by MFSA2026-39?
Users of Mozilla Thunderbird versions earlier than 140.10.1 are affected by MFSA2026-39.
5
Is there a known exploit for MFSA2026-39?
As of now, there are no publicly known exploits specifically targeting the vulnerabilities in MFSA2026-39.