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CVE-2026-104478

7.1 · HIGH

Formwork before 2.3.13 contains a path traversal vulnerability in BackupController that allows authenticated panel users to read or delete arbitrary files.

Published Oct 3, 2026CWE-22EPSS 0.35%

Overview

CVE-2026-104478 is a high-severity vulnerability. It was published on October 3, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/getformwork/formworkGitHubgithub.com/getformwork/formwork/commit/89e7821a6fcee89474cd401b3dde0c1dccb0687fRefwww.vulncheck.com/advisories/formwork-before-2.3.13-path-traversal-via-backupcontroller-download-and-delete

How CyberStrike helps

Frequently asked questions

What is CVE-2026-104478?

CVE-2026-104478 is a high-severity vulnerability. It was published on October 3, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-104478?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-104478?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-104478?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-104478 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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