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CVE-2026-4729 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: March 25, 2026

Mozilla Firefox - Remote Code Execution

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

Overview

Mozilla Firefox < 149 contains memory safety bugs caused by memory corruption issues, letting attackers potentially execute arbitrary code, exploit requires successful memory corruption.

Severity & Score

Severity: Critical

CVSS Score: 9.8

Impact

Attackers can exploit memory corruption to execute arbitrary code, potentially leading to full system compromise.

Mitigation

Update to version 149 or later.

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1944033%2C1997282%2C2009213%2C2011412%2C2021925%2C2022034
https://www.mozilla.org/security/advisories/mfsa2026-20/
https://www.mozilla.org/security/advisories/mfsa2026-23/

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-4729
Severity: Critical
CVSS Score: 9.8
Type: undefined
Status: unconfirmed

CWE

CWE-120

CVSS Metrics

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