What is CVE-2026-104478?

CVE-2026-104478 is a high-severity vulnerability in Getformwork Formwork, classified under Path Traversal. CVSS score: 7.1/10. Published 2026-10-03.

How severe is CVE-2026-104478?

High severity. CVSS v3 base score is 7.1 out of 10.

Path Traversal in Getformwork Formwork

CVE-2026-104478

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-10-03 · last modified 2026-10-03.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Getformwork Formwork

Weakness classification (CWE)

CWE-22 — Path Traversal

References

github.com/getformwork/formwork/commit/89e7821a6fcee89474cd401b3dde0c1dccb0687f (patch)
github.com/getformwork/formwork (product)
www.vulncheck.com/advisories/formwork-before-2.3.13-path-traversal-via-backupco… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104478?: CVE-2026-104478 is a high-severity vulnerability in Getformwork Formwork, classified under Path Traversal. CVSS score: 7.1/10. Published 2026-10-03.
How severe is CVE-2026-104478?: High severity. CVSS v3 base score is 7.1 out of 10.