CVE-2026-2768

CRITICAL

Firefox < 148 and Firefox ESR < 140.8 - Sandbox Escape via IndexedDB Storage

Title source: llm
STIX 2.1

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.

References (33)

Core 33
Core References

Scores

CVSS v3 10.0
EPSS 0.0037
EPSS Percentile 29.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-284 CWE-693
Status published
Products (8)
mozilla/firefox < 140.8.0
mozilla/firefox < 148.0
Mozilla/Firefox 140.8 - 140.*
Mozilla/Firefox 148
mozilla/thunderbird < 140.8.0
mozilla/thunderbird < 148.0
Mozilla/Thunderbird 140.8 - 140.*
Mozilla/Thunderbird 148
Published Feb 24, 2026
Tracked Since Feb 24, 2026