Skip to content
Heist/ feed
MediumFix available

PHP on Windows: Reserved Device Names Are Not Rejected Before File/Stream I/O which can cause DoS

Type: advisorySource: OSVRisk context updated1 source record

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.

Announced Source revision 3
Original source ↗
CVE context updated. The publisher announcement is unchanged.

BIT-libphp-2026-17545

Primary source · Revision 3

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:BIT-libphp-2026-17545

libphp

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
8.2.34

Source reference: /affected/0/ranges

8.3.35

Source reference: /affected/0/ranges

8.4.26

Source reference: /affected/0/ranges

8.5.11

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "8.2.0"
          },
          {
            "fixed": "8.2.34"
          },
          {
            "introduced": "8.3.0"
          },
          {
            "fixed": "8.3.35"
          },
          {
            "introduced": "8.4.0"
          },
          {
            "fixed": "8.4.26"
          },
          {
            "introduced": "8.5.0"
          },
          {
            "fixed": "8.5.11"
          }
        ]
      }
    ],
    "package": {
      "name": "libphp",
      "purl": "pkg:bitnami/libphp",
      "ecosystem": "Bitnami"
    },
    "severity": [
      {
        "type": "CVSS_V4",
        "score": "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"
      }
    ],
    "database_specific": {
      "source": "https://github.com/bitnami/vulndb/tree/main/data/libphp/BIT-libphp-2026-17545.json"
    }
  }
]
Related CVEs
CVE-2026-17545

Source reference: /aliases

Publisher severity

medium

Source reference: /database_specific/severity

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-17545 · Medium

PHP

CVE-2026-17545 · Medium

php

CVE-2026-17545 · Medium

php-min

Event
#59678 · Revision 3
Added to Heist Feed
Publisher date
Read the original announcement