CVE-2026-2807

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.8 / 10

Vector String

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

Vulnerability Description

Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148 and Thunderbird < 148.

Vulnerability Details

Published Date

February 24, 2026

Last Modified

February 25, 2026

CWE ID

CWE-787

Source

NVD

Vendor

mozilla

Product

firefox

External References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1756056%2C1999402%2C2004872%2C2006037%2C2012855
https://www.mozilla.org/security/advisories/mfsa2026-13/

CVE-2026-2807

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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