Home / Vulnerability Intelligence / CVE-2026-2799

CVE-2026-2799 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: February 25, 2026

Firefox - Use After Free

Published: February 24, 2026Updated: February 25, 2026Remote Exploitable

Overview

Firefox < 148 contains a use-after-free vulnerability caused by improper memory management in the DOM Core & HTML component, letting attackers cause memory corruption or remote code execution, exploit requires crafted web content.

Severity & Score

Severity: Critical

CVSS Score: 9.8

Impact

Attackers can cause memory corruption or execute arbitrary code remotely via crafted web content.

Mitigation

Update to version 148 or later.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2014551
https://www.mozilla.org/security/advisories/mfsa2026-13/
https://www.mozilla.org/security/advisories/mfsa2026-16/

Related Resources

Vulnerability Intelligence Dashboard
Credential Scanner

Details

CVE ID: CVE-2026-2799
Severity: Critical
CVSS Score: 9.8
Type: use_after_free
Status: confirmed

CWE

CWE-416

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H