CVE-2026-2802: Race condition in the JavaScript: GC component

Published Feb 24, 2026
·
Updated

Race condition in the JavaScript: GC component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Affected Software

4 affected componentsFixes available
Mozilla Firefox<148
148
Mozilla Thunderbird<148
148
Mozilla Firefox<148.0
Mozilla Thunderbird<148.0

Event History

Feb 24, 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·01:33 PM
Data Sourced
via MITRE·01:33 PM
Description
Data Sourced
via NVD·02:16 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-2802?

CVE-2026-2802 is classified as a high severity vulnerability due to its potential to cause a race condition in the JavaScript garbage collection component.

2

How do I fix CVE-2026-2802?

To fix CVE-2026-2802, update your Firefox to version 148 or later to eliminate the vulnerability.

3

What versions of Firefox are affected by CVE-2026-2802?

CVE-2026-2802 affects all versions of Firefox below 148.

4

What kind of vulnerability is CVE-2026-2802?

CVE-2026-2802 is a race condition vulnerability specifically occurring in the JavaScript garbage collection component of Firefox.

5

Is there a workaround for CVE-2026-2802 until a fix is applied?

There are no known workarounds for CVE-2026-2802, and the best mitigation is to upgrade to the latest Firefox version immediately.

Company

Resources

Contact

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