HarborGuard / CVE
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CRITICALCVE-2026-2777Published Modified CNA mozilla

CVE-2026-2777: Privilege escalation in the Messaging System component

Privilege escalation in the Messaging System component. 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