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CVE-2026-17545 Details
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Sep 25, 2026Exploitation: PocAutomatable: NoTechnical Impact: Partial
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/php/php-src/security/advisories/GHSA-9f67-6fw4-hpfp | CISA-ADP | Vendor AdvisoryExploit |
| https://github.com/php/php-src/security/advisories/GHSA-9f67-6fw4-hpfp | [email protected] | Vendor AdvisoryExploit |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-67 | Improper Handling of Windows Device Names | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| php php | >= 8.2.0, < 8.2.34 >= 8.3.0, < 8.3.35 >= 8.4.0, < 8.4.26 >= 8.5.0, < 8.5.11 |
CPE
Remediation
| |
| microsoft windows | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 23, 2026 | Initial Analysis | [email protected] |
| Sep 25, 2026 | New CVE Received | [email protected] |
| Sep 25, 2026 | CVE Modified | CISA-ADP |