---
title: "CVE-2026-104478: Formwork - Path Traversal"
description: "Formwork < 2.3.13 contains a path traversal caused by base64-encoded backslash-separated traversal payload in BackupController, letting authenticated panel users read or delete arbitrary files, exploit requires backup download or delete permission."
url: https://panop.io/threat-heartbeat/CVE-2026-104478/
---

# CVE-2026-104478 Formwork - Path Traversal

Formwork < 2.3.13 contains a path traversal caused by base64-encoded backslash-separated traversal payload in BackupController, letting authenticated panel users read or delete arbitrary files, exploit requires backup download or delete permission.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.35% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-104478)

## Details

Type

Path Traversal

Impact

File System Read, File System Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

Published

3 October 2026

Updated

15 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Update to version 2.3.13 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-104478](https://nvd.nist.gov/vuln/detail/CVE-2026-104478)
- [https://github.com/getformwork/formwork](https://github.com/getformwork/formwork)
- [https://github.com/getformwork/formwork/commit/89e7821a6fcee89474cd401b3dde0c1dccb0687f](https://github.com/getformwork/formwork/commit/89e7821a6fcee89474cd401b3dde0c1dccb0687f)
- [https://www.vulncheck.com/advisories/formwork-before-2.3.13-path-traversal-via-backupcontroller-download-and-delete](https://www.vulncheck.com/advisories/formwork-before-2.3.13-path-traversal-via-backupcontroller-download-and-delete)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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