CVE-2026-26143 Microsoft PowerShell 输入验证不正确导致安全功能绕过漏洞

# PoC for CVE-2026-26143: Microsoft PowerShell Security Feature Bypass # Description: Demonstrates how improper input validation can lead to a security bypass. function Invoke-CVE202626143 { param ( [string]$UserInput ) # Simulating the vulnerable scenario where input is not strictly validated # The attacker crafts input that includes escape characters or logical bypasses if ($UserInput -match "--bypass-check") { Write-Host "[+] Security check bypassed via crafted input." # In a real exploit, this would execute restricted code Start-Process powershell.exe -ArgumentList "/c echo 'Restricted Command Executed'" } else { Write-Host "[-] Normal execution flow." } } # Example usage Invoke-CVE202626143 -UserInput "normal_data" Invoke-CVE202626143 -UserInput "--bypass-check"