CVE-2026-2768
Modified Modified - Updated After Analysis

Sandbox Escape in Firefox IndexedDB Prior to

Publication date: 2026-02-24

Last updated on: 2026-06-30

Assigner: Mozilla Corporation

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.

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Meta Information

Published
2026-02-24
Last Modified
2026-06-30
Generated
2026-07-06
AI Q&A
2026-02-24
EPSS Evaluated
2026-07-05
NVD
CVE-2026-2768

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)
mozilla thunderbird to 140.8.0 (exc)
mozilla firefox to 140.8.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CWE-693 The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

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Executive Summary

This vulnerability is a sandbox escape in the Storage: IndexedDB component of Firefox. It affects versions of Firefox earlier than 148 and Firefox ESR earlier than 140.8.

Impact Analysis

A sandbox escape vulnerability can allow an attacker to break out of the restricted environment (sandbox) that normally limits the execution of code, potentially leading to unauthorized access to system resources or data.

Compliance Impact

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Detection Guidance

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