REDHAT-BUG-2503454: Medium severity Mozilla Firefox vulnerability
Published Jul 21, 2026
·Updated
Mitigation bypass in the PDF Viewer component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.
Affected Software
1 affected component
Mozilla Firefox<153, <140.13
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Mozilla Firefox / Firefox ESRto a version that resolves this vulnerability.Fixed in 153 - Upgrade
Upgrade
Mozilla Firefox ESRto a version that resolves this vulnerability.Fixed in 140.13
Event History
Jul 21, 2026
Data Sourced
via Red Hat·01:02 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of REDHAT-BUG-2503454?
The severity of REDHAT-BUG-2503454 is classified as medium (4).
2
How do I fix REDHAT-BUG-2503454?
To fix REDHAT-BUG-2503454, update to Firefox version 153 or Firefox ESR version 140.13 or later.
3
What component is affected by REDHAT-BUG-2503454?
REDHAT-BUG-2503454 affects the PDF Viewer component in Mozilla Firefox.
4
When was REDHAT-BUG-2503454 published?
REDHAT-BUG-2503454 was published on July 21, 2026.
5
Is there a workaround for REDHAT-BUG-2503454?
There is no specific workaround mentioned for REDHAT-BUG-2503454; updating the software is recommended.