High severity · published Oct 2, 2026
CVE-2026-104478
Formwork before 2.3.13 Path Traversal via BackupController Download and Delete
7.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
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
Confidentiality
High
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
formwork · getformwork
before 2.3.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104478
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104478
patch
https://github.com/getformwork/formwork/commit/89e7821a6fcee89474cd401b3dde0c1dccb0687f
product
https://github.com/getformwork/formwork
third-party-advisory
https://www.vulncheck.com/advisories/formwork-before-2.3.13-path-traversal-via-backupcontroller-download-and-delete
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