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CRITICALCVE-2026-0892Published Modified CNA mozilla

CVE-2026-0892: Memory safety bugs fixed in Firefox 147 and Thunderbird 147

Memory safety bugs present in Firefox 146 and Thunderbird 146. 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 was fixed in Firefox 147 and Thunderbird 147.

Metrics

CVSS v3.1
9.8
Severity
CRITICAL
Fixed in
147
Affected Products
2

Fix available

147
Affected packages
  • Mozilla / Firefox
    Fixed in 147
  • Mozilla / Thunderbird
    Fixed in 147
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
CVE-2026-0892: Memory safety bugs fixed in Firefox 147 and Thunderbird 147 | HarborGuard CVE