HarborGuard / CVE
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CRITICALCVE-2026-2793Published Modified CNA mozilla

CVE-2026-2793: Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148

Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, 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 was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Metrics

CVSS v3.1
9.8
Severity
CRITICAL
Fixed in
115.33
Affected Products
2

Fix available

115.33140.8148
Affected packages
  • Mozilla / Firefox
    Fixed in 115.33, 140.8, 148
  • Mozilla / Thunderbird
    Fixed in 140.8, 148
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References