REDHAT-BUG-2503527: Low severity Mozilla Firefox vulnerability
Published Jul 21, 2026
·Updated
Information disclosure in the Networking: WebSockets 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·01:05 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of REDHAT-BUG-2503527?
The severity of REDHAT-BUG-2503527 is classified as low.
2
What does REDHAT-BUG-2503527 affect?
REDHAT-BUG-2503527 affects the Networking: WebSockets component in Mozilla Firefox and Mozilla Firefox ESR.
3
How do I fix REDHAT-BUG-2503527?
To fix REDHAT-BUG-2503527, upgrade to Firefox version 153 or Firefox ESR version 140.13.
4
When was REDHAT-BUG-2503527 published?
REDHAT-BUG-2503527 was published on July 21, 2026.
5
What is the nature of the issue in REDHAT-BUG-2503527?
The issue in REDHAT-BUG-2503527 is related to information disclosure in the Networking: WebSockets component.