CVE-2026-2768

CWE-284 — Improper Access ControlCWE-69312 documents9 sources
Severity
10.0CRITICAL
EPSS
0.1%
top 73.23%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedFeb 24

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HExploitability: 3.9 | Impact: 6.0

Affected Packages7 packages

▶CVEListV5mozilla/firefoxunspecified — 148
▶NVDmozilla/firefox< 140.8.0+1
▶CVEListV5mozilla/firefox_esrunspecified — 140.8
▶CVEListV5mozilla/thunderbirdunspecified — 148+1
▶NVDmozilla/thunderbird< 140.8.0+1

🔴Vulnerability Details

3
GHSA
GHSA-76rw-rj58-mpqc: Sandbox escape in the Storage: IndexedDB component↗2026-02-24
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OSV
CVE-2026-2768: Sandbox escape in the Storage: IndexedDB component↗2026-02-24
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CVEList
Sandbox escape in the Storage: IndexedDB component↗2026-02-24
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📋Vendor Advisories

6
Red Hat
firefox: thunderbird: Sandbox escape in the Storage: IndexedDB component↗2026-02-24
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Debian
CVE-2026-2768: firefox - Sandbox escape in the Storage: IndexedDB component. This vulnerability affects F...↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-15: CVE-2026-2768↗
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Mozilla
Mozilla Foundation Security Advisory 2026-13: CVE-2026-2768↗
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Mozilla
Mozilla Foundation Security Advisory 2026-17: CVE-2026-2768↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-2768 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-2768 firefox: thunderbird: Sandbox escape in the Storage: IndexedDB component↗2026-02-24
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