MFSA2026-46: Security Vulnerabilities fixed in Firefox 151
Published May 19, 2026
·Updated
Security Vulnerabilities fixed in Firefox 151
Affected Software
1 affected componentFixes available
Mozilla Firefox<151
151
Event History
May 19, 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 MFSA2026-46?
The severity of MFSA2026-46 is categorized as critical due to the potential for exploitation in Mozilla Firefox.
2
How do I fix MFSA2026-46?
To fix MFSA2026-46,update your Mozilla Firefox to version 152 or later.
3
What vulnerabilities are addressed in MFSA2026-46?
MFSA2026-46 addresses multiple security vulnerabilities that could lead to unauthorized access or code execution in Firefox.
4
Who is affected by MFSA2026-46?
Users running Mozilla Firefox versions up to and including 151 are affected by MFSA2026-46.
5
What should I do if I can't update Firefox for MFSA2026-46?
If you are unable to update Firefox for MFSA2026-46, consider using an alternative browser until the update can be applied.