CVE-2026-104478

HIGH

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.

CVSS v3.1 Score

7.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
LOW
Published: 10/3/2026Modified: 10/5/2026

Related Intelligence (1)

HIGHVulnerability

NVD HIGH: CVE-2026-104478 — Formwork before 2.3.13 contains a path traversal vulnerability in BackupControll...

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.

CVE-2026-104478
NIST NVD

References (3)

https://github.com/getformwork/formworkhttps://github.com/getformwork/formwork/commit/89e7821a6fcee89474cd401b3dde0c1dccb0687fhttps://www.vulncheck.com/advisories/formwork-before-2.3.13-path-traversal-via-backupcontroller-download-and-delete