CVE-2026-92038: Mitigation bypass in the Remote Settings Client component

Published Sep 15, 2026
·
Updated

Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

Affected Software

9 affected componentsFixes available
Firefox=156, =153.3
Mozilla Firefox<156
156
Mozilla Firefox ESR<153.3
153.3
Mozilla Thunderbird<156
156
Mozilla Thunderbird<153.3
153.3
Mozilla Firefox<153.3.0
Mozilla Firefox>=154.0.0<156.0.0
Mozilla Thunderbird<153.3.0
Mozilla Thunderbird>=154.0<156.0

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 156
  2. Upgrade

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

    Fixed in 153.3
  3. Upgrade

    Upgrade Firefox / Firefox ESR / Thunderbird to a version that resolves this vulnerability.

    Fixed in 156
  4. Upgrade

    Upgrade Firefox / Firefox ESR / Thunderbird to a version that resolves this vulnerability.

    Fixed in 153.3

Event History

Sep 15, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·12:33 PM
Data Sourced
via MITRE·12:33 PM
Description
Data Sourced
via NVD·01:16 PM
DescriptionSeverityWeaknessAffected Software
Sep 16, 2026
Updated
via Mozilla·12:00 AM
Affected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

Which releases should be deployed to obtain the fix?

Deploy Firefox 156 or Firefox ESR 153.3, which include the fix for this issue.

Company

Resources

Contact

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