REDHAT-BUG-2503512: Medium severity Mozilla Firefox vulnerability
Published Jul 21, 2026
·Updated
Mitigation bypass in the DOM: 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<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·01:05 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of REDHAT-BUG-2503512?
The severity of REDHAT-BUG-2503512 is rated as medium (4).
2
How do I fix REDHAT-BUG-2503512?
To fix REDHAT-BUG-2503512, upgrade to Firefox 153 or Firefox ESR 140.13 or later.
3
What is the description of REDHAT-BUG-2503512?
REDHAT-BUG-2503512 describes a mitigation bypass in the DOM: Networking component.
4
Which software is affected by REDHAT-BUG-2503512?
The affected software for REDHAT-BUG-2503512 includes Mozilla Firefox and Mozilla Firefox ESR 140.13.
5
When was REDHAT-BUG-2503512 published?
REDHAT-BUG-2503512 was published on July 21, 2026.