CVEvulnerability

CVE-2026-17545

6.9 MEDIUM Published 2026-09-25 Modified 2026-10-23 Official page ↗
Status
Analyzed
Published
2026-09-25
Last modified
2026-10-23
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.9 MEDIUM — CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-67

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.

Affected configurations

• php php (>= 8.2.0 < 8.2.34) • php php (>= 8.3.0 < 8.3.35) • php php (>= 8.4.0 < 8.4.26) • php php (>= 8.5.0 < 8.5.11)

Related

Weakness · CWE (1)

  • CWE-67 Improper Handling of Windows Device Names weakness

References