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CVE-2026-2768
AST
Critical

Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Th…

CVSS
10.0
Critical
EPSS
0.00
p27
Published
2026-01-01
Updated
2026-01-01
Description

Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Tags · CWE
Pre-auth
CWE-284
CAPEC-19
CAPEC-441
CAPEC-478
CAPEC-479
CAPEC-502
CAPEC-503
CAPEC-536
CAPEC-546
CAPEC-550
CAPEC-551
CAPEC-552
CAPEC-556
CAPEC-558
CAPEC-562
CAPEC-563
CAPEC-564
CAPEC-578
Affected products
Firefox < 140.8.0Firefox < 148.0Thunderbird < 140.8.0Thunderbird < 148.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Timeline
2026-01-01
Published
2026-01-01
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: C
Changed (C)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.004 · p27
Known exploited (KEV)
No
MITRE ATT&CK
Inferred via CAPEC
└ via CAPEC-552 · CWE-284
└ via CAPEC-19 · CWE-284
└ via CAPEC-564 · CWE-284
└ via CAPEC-562 · CWE-284
└ via CAPEC-558 · CWE-284
└ via CAPEC-552 · CWE-284
└ via CAPEC-550 · CWE-284
└ via CAPEC-564 · CWE-284
└ via CAPEC-478 · CWE-284
└ via CAPEC-564 · CWE-284
└ via CAPEC-556 · CWE-284
└ via CAPEC-558 · CWE-284
└ via CAPEC-19 · CWE-284
└ via CAPEC-564 · CWE-284
└ via CAPEC-552 · CWE-284
└ via CAPEC-479 · CWE-284
└ via CAPEC-578 · CWE-284
Known exploits — Сканер-ВС
No Сканер-ВС checks registered for this vulnerability yet.
Affected products
ProductVendorStatus
firefoxTracked
firefoxTracked
firefoxTracked
firefox-esrTracked
thunderbirdTracked
firefox*Tracked
thunderbird*Tracked