REDHAT-BUG-2503473: Medium severity Mozilla Firefox vulnerability
Published Jul 21, 2026
·Updated
Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.
Affected Software
2 affected components
Mozilla Firefox<153
Mozilla Firefox ESR<140.13
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 153 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 140.13
Event History
Jul 21, 2026
Data Sourced
via Red Hat·01:03 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of REDHAT-BUG-2503473?
The severity of REDHAT-BUG-2503473 is rated as medium with a score of 4.
2
How do I fix REDHAT-BUG-2503473?
To fix REDHAT-BUG-2503473, update to Firefox version 153 or Firefox ESR version 140.13.
3
What type of vulnerability is REDHAT-BUG-2503473?
REDHAT-BUG-2503473 is classified as a site isolation issue in the Networking component.
4
Which software is affected by REDHAT-BUG-2503473?
The affected software for REDHAT-BUG-2503473 includes Mozilla Firefox and Mozilla Firefox ESR.
5
When was REDHAT-BUG-2503473 published?
REDHAT-BUG-2503473 was published on July 21, 2026.