Arbitrary directory creation via CLI path traversal
Published May 13, 2026 · Updated May 13, 2026
Path traversal in Flight before 3.18.1 allows local users to create arbitrary directories outside the project root through its CLI. The make:controller command passes a path derived from the controller name to recursive mkdir before Nette validates the resulting class name. Exploitation requires permission to run the Flight CLI and can alter the directory structure accessible to that process, while the subsequent class-file write is rejected.
Summary
What happened
Path traversal in Flight before 3.18.1 allows local users to create arbitrary directories outside the project root through its CLI. The make:controller command passes a path derived from the controller name to recursive mkdir before Nette validates the resulting class name. Exploitation requires permission to run the Flight CLI and can alter the directory structure accessible to that process, while the subsequent class-file write is rejected.
The record
- CVE
- CVE-2026-42549
- Published
- May 13, 2026
- Updated
- May 13, 2026
- Vendor
- FlightPHP
- Product
- Flight
- Classifications
- CWE-22
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 13, 2026CVE publishedPublication date reported by the CVE source.
- May 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 3.18.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Flight make:controller traversal proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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