CVE-2026-6770

Other issue in the Storage: IndexedDB component

Published Apr 21, 2026 CVSS 3.1 · 6.5 Medium EPSS 3.9% KEV · Not listed
Description
Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-4546-1 firefox-esr security update
Debian DLA Debian DLA DLA-4549-1 thunderbird security update
Debian DSA Debian DSA DSA-6225-1 firefox-esr security update
Debian DSA Debian DSA DSA-6229-1 thunderbird security update
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird
Type Values Removed Values Added
Weaknesses CWE-264
Type Values Removed Values Added
Weaknesses CWE-264
Type Values Removed Values Added
Description Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10. Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Weaknesses CWE-200
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Description Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.
Title Other issue in the Storage: IndexedDB component
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
May 27, 2026, 5:05 PM
Reserved
Apr 21, 2026, 12:41 PM
Status
Analyzed
Published
Apr 21, 2026, 1:16 PM
Modified
Oct 26, 2026, 12:10 AM
Severity
Moderate
Public date
Apr 21, 2026, 12:41 PM