CVE-2026-17545
UNKNOWN
NVD
CVSS Score
0
Severity
UNKNOWN
Published
Sep 25, 2026
Vendor
unknown
Description
On Windows, PHP's filesystem and stream APIs do not reject reserved device names such as CON, PRN, AUX, NUL, COM1 to COM9, LPT1 to LPT9, CONIN$ and CONOUT$ when they appear as a component of a path. An attacker-controlled filename therefore reaches CreateFileW() and opens a device instead of the regular file the application expected, which can block or hang the request and exhaust worker processes.