CVE-2026-42549
Medium
Description
Flight is an extensible micro-framework for PHP. Prior to 3.18.1, the make:controller CLI command calls mkdir(..., recursive: true) on a path built from the user-supplied controller name, before Nette's class-name validation runs. The class-file write is correctly rejected by Nette when the name contains /, but the recursive directory creation side effect is already committed — including directories located outside the project root through ../ traversal. This vulnerability is fixed in 3.18.1.
SeverityMedium
CVSS4.4
Exploit probability—
ProductFlightphp/core
PublishedMay 13, 2026
First seenMay 13, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- flightphp/core3.18.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| flightphp/corePackagist | v < 3.18.1 | 3.18.1 |
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