REDHAT-BUG-2571102: Use After Free

Published Nov 10, 2026

Updated

Sandbox escape due to use-after-free in the DOM: Service Workers component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, and Thunderbird 160.

Affected Software

0 affected components

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Firefox to a version that resolves this vulnerability.
Fixed in 160
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 115.45
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 153.7
Upgrade
Upgrade Thunderbird to a version that resolves this vulnerability.
Fixed in 160

Event History

Nov 10, 2026

Data Sourced

via Red Hat·08:40 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which releases contain the fix?

The issue was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, and Thunderbird 160.

Which component is involved in this vulnerability?

The affected component is Service Workers in the DOM. The flaw is a use-after-free that can lead to a sandbox escape.