CVE-2026-104478

Summary

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.

Affected Software

Weaknesses

• CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

References

• https://github.com/getformwork/formwork/commit/89e7821a6fcee89474cd401b3dde0c1dccb0687f
• https://github.com/getformwork/formwork
• https://www.vulncheck.com/advisories/formwork-before-2.3.13-path-traversal-via-backupcontroller-download-and-delete

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