MFSA2026-82: Security Vulnerabilities fixed in Firefox 155

Published Sep 1, 2026
·
Updated

Security Vulnerabilities fixed in Firefox 155

Affected Software

1 affected componentFixes available
Mozilla Firefox<155
155

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 155

Event History

Sep 1, 2026
Advisory Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What severity is assigned to this advisory?

The advisory is rated high severity, with a severity value of 7.

2

When was this advisory published and last modified?

It was published on 2026-09-01 and was last modified on 2026-09-01.

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