Is CVE-2026-104478 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-104478?

CVE-2026-104478 has a CVSS v3 severity of HIGH (7.1).

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CVE-2026-104478

Description

Formwork before 2.3.13 contains a path traversal vulnerability in BackupController that allows authenticated panel users to read or delete arbitrary files. Attackers with backup download or delete permission can supply a base64-encoded backslash-separated traversal payload that bypasses PHP basename on Linux to access files outside the backup directory.