REDHAT-BUG-2503451: High severity Mozilla Firefox vulnerability
Published Jul 21, 2026
·Updated
Incorrect boundary conditions in the JavaScript: WebAssembly 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
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·01:02 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of REDHAT-BUG-2503451?
The severity of REDHAT-BUG-2503451 is classified as high with a score of 7.
2
How do I fix REDHAT-BUG-2503451?
To fix REDHAT-BUG-2503451, update to Firefox version 153 or Firefox ESR version 140.13.
3
What does REDHAT-BUG-2503451 pertain to?
REDHAT-BUG-2503451 pertains to incorrect boundary conditions in the JavaScript: WebAssembly component.
4
When was REDHAT-BUG-2503451 published?
REDHAT-BUG-2503451 was published on July 21, 2026.
5
Is there a known software affected by REDHAT-BUG-2503451?
Yes, the affected software is Mozilla Firefox.