PoC Index

CVE-2026-42549

MEDIUM 4.4EPSS 0.2%

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.

CVSS v3.1
4.4 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v3.1
4.4 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
EPSS
0.15% chance of exploitation in the next 30 days, 5th percentile
Published
2026-05-13
Updated
2026-05-14

Proof-of-concept exploits (1)

References

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