MEDIUM 6.9 NVD
CVE-2026-17545
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
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.
References
- https://github.com/php/php-src/security/advisories/GHSA-9f67-6fw4-hpfp
- https://github.com/php/php-src/security/advisories/GHSA-9f67-6fw4-hpfp
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-09-25 via NVD.
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