Is CVE-2026-109777 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109777?

CVE-2026-109777 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-109777

Description

Information disclosure in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.