MFSA2026-10: Security Vulnerabilities fixed in Firefox 147.0.4, ESR 140.7.1, and ESR 115.32.1
Published Feb 16, 2026
·Updated
Security Vulnerabilities fixed in Firefox 147.0.4, ESR 140.7.1, and ESR 115.32.1
Affected Software
3 affected componentsFixes available
Mozilla Firefox<147.0.4
147.0.4
Mozilla Firefox ESR<115.32.1
115.32.1
Mozilla Firefox ESR<140.7.1
140.7.1
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 are the vulnerabilities addressed in MFSA2026-10?
MFSA2026-10 addresses multiple security vulnerabilities in Mozilla Firefox and Firefox ESR versions 147.0.4, 140.7.1, and 115.32.1.
2
How do I fix MFSA2026-10?
To fix MFSA2026-10, update to Mozilla Firefox version 147.0.4 or Firefox ESR versions 140.7.1 or 115.32.1.
3
What versions of Firefox are affected by MFSA2026-10?
Mozilla Firefox versions up to 147.0.4 and Firefox ESR versions up to 140.7.1 and 115.32.1 are affected by MFSA2026-10.
4
What is the severity of MFSA2026-10?
The specific severity of the vulnerabilities in MFSA2026-10 is not detailed in the advisory, but they are categorized as security vulnerabilities.
5
Should I apply MFSA2026-10 updates immediately?
Yes, it is highly recommended to apply the updates for MFSA2026-10 as soon as possible to protect against potential security risks.