CVE-2026-17545
Published: September 26, 2026Last modified: September 26, 2026
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.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | php81 | Not affected (8.1.19-r0) |
| 25 LTS | php83 | Not affected (8.3.21-r0) | |
| Stream | php83 | Not affected (8.3.4-r2) |