{"id":"CVE-2026-42549","aliases":["EUVD-2026-30148","GHSA-3xjv-pmf2-gf2q"],"status":"published","title":"Flight: Path traversal in `make:controller` CLI creates arbitrary directories outside project root","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.","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00204,"percentile":0.10409,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2026-05-06T21:34:39Z","modified":"2026-10-28T02:30:42Z","fixes":[{"ecosystem":"Packagist","package":"flightphp/core","fixed_in":["3.18.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"flightphp/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18.1"}]}]},{"source":"osv","ecosystem":"Packagist","package":"flightphp/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18.1"}]}],"versions":["v1.0","v1.1","v1.1.10","v1.1.5","v1.2","v1.2.13","v1.2.14","v1.2.15","v1.2.17","v1.2.18","v1.2.19","v1.2.20","v1.2.21","v1.2.22","v1.3.0","v1.3.1","v1.3.2","v1.3.3","v1.3.4","v1.3.5","v1.3.7","v1.3.8","v1.3.9","v2.0.0","v2.0.1","v3.0.0","v3.0.1","v3.0.2","v3.1.0","v3.1.1","v3.10.0","v3.10.1","v3.11.0","v3.11.1","v3.12.0","v3.13.0","v3.13.1","v3.14.0","v3.15.0","v3.15.1","v3.15.2","v3.15.3","v3.16.0","v3.16.1","v3.17.0","v3.17.1","v3.17.2","v3.17.3","v3.17.4","v3.18.0","v3.2.0","v3.3.0","v3.4.0","v3.4.1","v3.4.2","v3.5.0","v3.5.2","v3.5.3","v3.6.0","v3.6.1","v3.6.2","v3.7.0","v3.7.1","v3.7.2","v3.8.0","v3.8.1","v3.9.0"]}],"products":[{"vendor":"flightphp","product":"core"},{"vendor":"opnsense","product":"core"}],"references":[{"url":"https://github.com/flightphp/core/security/advisories/GHSA-3xjv-pmf2-gf2q","tags":["x_refsource_CONFIRM","exploit","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42549","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-3xjv-pmf2-gf2q"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42549.json","tags":["advisory"]},{"url":"https://github.com/flightphp/core","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-42549","title":"Flight: Path traversal in `make:controller` CLI creates arbitrary directories outside project root","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.","status":"published","published":"2026-05-13T19:22:20.932Z","modified":"2026-05-14T19:52:29.945Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T13:40:35.004553Z"}],"euvd":[{"id":"EUVD-2026-30148","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.","status":"published","published":"2026-05-13T19:22:20Z","modified":"2026-05-14T19:52:29Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T19:04:30.595644Z"}],"ghsa":[{"id":"GHSA-3xjv-pmf2-gf2q","title":"Flight has path traversal in `make:controller` CLI that creates arbitrary directories outside project root","description":"### Summary\nThe `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.\n\n### Affected code\n`flight/commands/ControllerCommand.php` (≈ 63-66):\n\n```php\nif (is_dir(dirname($controllerPath)) === false) {\n    $io-\u003einfo('Creating directory ' . dirname($controllerPath), true);\n    mkdir(dirname($controllerPath), 0755, true);   // un-normalized, runs before validation\n}\n```\n\n### Proof of concept\n```\n$ php vendor/flightphp/runway/runway make:controller '../../../../tmp/CONTROLLER_TRAVERSAL_TEST/pwn'\nCreating directory .../app/controllers/../../../../tmp/CONTROLLER_TRAVERSAL_TEST\nNette\\InvalidArgumentException: Value '../../../../tmp/CONTROLLER_TRAVERSAL_TEST/pwnController' is not valid class name.\n\n$ ls /home/user/tmp/CONTROLLER_TRAVERSAL_TEST\n(directory exists — created before the exception was thrown)\n```\n\n### Impact\n- **Arbitrary directory creation outside the project root**, executable by any local actor that can run the Flight CLI (developer machine, shared CI build agent, compromised dev container).\n- Primes log-file planting for chained LFI exploitation (e.g. creating a directory where an attacker can later drop a `.php` file to be included via a distinct template-include weakness).\n- On Windows, the `\\` separator opens additional traversal surface.\n\n### Patch (fixed in `3.18.1`, commit `b8dd23a`)\nThe controller name is now normalized with `basename()` and validated against `^[A-Za-z_][A-Za-z0-9_]*$` before any `mkdir` side effect runs.\n\n### Credit\nDiscovered by **@Rootingg**.","status":"published","published":"2026-05-06T21:34:39Z","modified":"2026-05-14T20:40:00Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:40:09.033429Z"}],"nvd":[{"id":"CVE-2026-42549","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.","status":"published","published":"2026-05-13T20:16:21.927Z","modified":"2026-10-26T14:10:00.13Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:19.020465Z"}],"osv":[{"id":"CVE-2026-42549","title":"Flight: Path traversal in `make:controller` CLI creates arbitrary directories outside project root","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.","status":"published","published":"2026-05-13T19:22:20.932Z","modified":"2026-10-28T02:30:42.362167035Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:45:04.117819Z"},{"id":"GHSA-3xjv-pmf2-gf2q","title":"Flight has path traversal in `make:controller` CLI that creates arbitrary directories outside project root","description":"### Summary\nThe `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.\n\n### Affected code\n`flight/commands/ControllerCommand.php` (≈ 63-66):\n\n```php\nif (is_dir(dirname($controllerPath)) === false) {\n    $io-\u003einfo('Creating directory ' . dirname($controllerPath), true);\n    mkdir(dirname($controllerPath), 0755, true);   // un-normalized, runs before validation\n}\n```\n\n### Proof of concept\n```\n$ php vendor/flightphp/runway/runway make:controller '../../../../tmp/CONTROLLER_TRAVERSAL_TEST/pwn'\nCreating directory .../app/controllers/../../../../tmp/CONTROLLER_TRAVERSAL_TEST\nNette\\InvalidArgumentException: Value '../../../../tmp/CONTROLLER_TRAVERSAL_TEST/pwnController' is not valid class name.\n\n$ ls /home/user/tmp/CONTROLLER_TRAVERSAL_TEST\n(directory exists — created before the exception was thrown)\n```\n\n### Impact\n- **Arbitrary directory creation outside the project root**, executable by any local actor that can run the Flight CLI (developer machine, shared CI build agent, compromised dev container).\n- Primes log-file planting for chained LFI exploitation (e.g. creating a directory where an attacker can later drop a `.php` file to be included via a distinct template-include weakness).\n- On Windows, the `\\` separator opens additional traversal surface.\n\n### Patch (fixed in `3.18.1`, commit `b8dd23a`)\nThe controller name is now normalized with `basename()` and validated against `^[A-Za-z_][A-Za-z0-9_]*$` before any `mkdir` side effect runs.\n\n### Credit\nDiscovered by **@Rootingg**.","status":"published","published":"2026-05-06T21:34:39Z","modified":"2026-05-14T20:48:36.195788Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:36.092962Z"}]}}