REDHAT-BUG-2517819: Low severity Mozilla Firefox vulnerability

The issue was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

The vulnerability affects the Data Loss Prevention component.

Published Aug 18, 2026

Updated

Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

Affected Software

3 affected components

Mozilla Firefox<154

Mozilla Firefox ESR 140<140.14

Mozilla Firefox ESR 153<153.1

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Firefox to a version that resolves this vulnerability.
Fixed in 154
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 140.14
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 153.1

Aug 18, 2026

Data Sourced

via Red Hat·12:47 PM

DescriptionSeverityAffected Software

The issue was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

The vulnerability affects the Data Loss Prevention component.