Is CVE-2026-109741 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109741?

CVE-2026-109741 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-109741

Description

Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.