REDHAT-BUG-2450711: High severity Mozilla Firefox vulnerability

Published Mar 24, 2026
·
Updated

Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.

Affected Software

4 affected components
Mozilla Firefox<149, =148
Mozilla Firefox ESR<115.34, <140.9, =115.33, =140.8
Mozilla Thunderbird=148
Mozilla Thunderbird ESR=140.8

Event History

Mar 24, 2026
Data Sourced
via Red Hat·01:01 PM
DescriptionSeverityAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2450711?

The severity of REDHAT-BUG-2450711 is considered high due to evidence of memory corruption that could potentially allow for arbitrary code execution.

2

How do I fix REDHAT-BUG-2450711?

To fix REDHAT-BUG-2450711, users should upgrade to the latest version of Firefox or Thunderbird that does not include the vulnerability.

3

Which versions are affected by REDHAT-BUG-2450711?

Affected versions of REDHAT-BUG-2450711 include Firefox ESR 115.33, Firefox ESR 140.8, Firefox 148, and Thunderbird 148.

4

What products are impacted by REDHAT-BUG-2450711?

REDHAT-BUG-2450711 impacts Mozilla Firefox, Firefox ESR, Thunderbird, and Thunderbird ESR.

5

Is there evidence of exploitation for REDHAT-BUG-2450711?

While there is no confirmed exploit for REDHAT-BUG-2450711, the evidence of memory safety issues suggests that exploitation is possible with sufficient effort.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203