CVE-2026-2802 — Race Condition in Mozilla Firefox

CWE-362 — Race Condition9 documents8 sources
Severity
4.2MEDIUMNVD
EPSS
0.0%
top 91.33%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxMozilla Thunderbird
Timeline
PublishedFeb 24

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:NExploitability: 1.6 | Impact: 2.5

Affected Packages2 packages

▶NVDmozilla/firefox< 148.0
▶NVDmozilla/thunderbird< 148.0

🔴Vulnerability Details

3
GHSA
GHSA-p9gc-q2gc-jc6r: Race condition in the JavaScript: GC component↗2026-02-24
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OSV
CVE-2026-2802: Race condition in the JavaScript: GC component↗2026-02-24
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CVEList
Race condition in the JavaScript: GC component↗2026-02-24
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📋Vendor Advisories

4
Red Hat
firefox: thunderbird: Race condition in the JavaScript: GC component↗2026-02-24
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Debian
CVE-2026-2802: firefox - Race condition in the JavaScript: GC component. This vulnerability affects Firef...↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-13: CVE-2026-2802↗
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Mozilla
Mozilla Foundation Security Advisory 2026-16: CVE-2026-2802↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-2802 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-2802 — Race Condition in Mozilla Firefox | cvebase