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CVE-2026-17545

nvd nist
Published: Sep 25, 2026Modified: Oct 23, 2026

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6.9
Vector
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
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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:XShow less
Source: security@php.net (Secondary)

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 (4)

Products: Php: Php
Php
1 product
Php
Configuration A
4 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Php
Php
8.2.0 ≤ version < 8.2.34
Php
8.3.0 ≤ version < 8.3.35
Php
8.4.0 ≤ version < 8.4.26
Php
8.5.0 ≤ version < 8.5.11
Running on/withPlatform Versions
Microsoft
Windows
All versions

Related CWEs

CWE-67
Improper Handling of Windows Device Names
The product constructs pathnames from user input, but it does not handle or incorrectly handles a pathname containing a Windows device name such as AUX or CON. This typically leads to denial of service or an information exposure when the application attempts to process the pathname as a regular file.

References (2)

Source: security@php.net
Vendor AdvisoryExploit
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Vendor AdvisoryExploit

Timeline

No history available yet.