CVE-2026-124859: Sandbox escape due to incorrect boundary conditions in the Storage: Cache API component

Published Nov 10, 2026
·
Updated

Sandbox escape due to incorrect boundary conditions in the Storage: Cache API component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.

Affected Software

6 affected componentsFixes available
Mozilla Firefox<160
Mozilla Firefox ESR 115<115.45
Mozilla Firefox ESR 153<153.7
Mozilla Firefox ESR<115.45
115.45
Mozilla Firefox ESR<153.7
153.7
Mozilla Firefox<160
160

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 115.45
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 153.7
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 160
  4. Upgrade

    Upgrade Mozilla Firefox to a version that resolves this vulnerability.

    Fixed in 160
  5. Upgrade

    Upgrade Mozilla Firefox ESR to a version that resolves this vulnerability.

    Fixed in 115.45
  6. Upgrade

    Upgrade Mozilla Firefox ESR to a version that resolves this vulnerability.

    Fixed in 153.7

Event History

Nov 10, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·01:28 PM
Data Sourced
via MITRE·01:28 PM
Description
Data Sourced
via NVD·02:17 PM
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

Which Firefox releases contain the fix?

The issue was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.

2

Does exploitation require prior authentication or user interaction?

The vector indicates exploitation can be performed over the network with low attack complexity and no privileges required, but it requires user interaction.

3

What is the potential impact if exploitation succeeds?

Successful exploitation can escape the sandbox and has high potential impact on confidentiality, integrity, and availability. The scope is changed, meaning the impact can extend beyond the initially affected security authority.

Company

Resources

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