Unverified50% confidenceFactExact time
The x402 protocol attack surface includes Authorization Bypass, where an attacker may circumvent or forge payment authorization to achieve unauthorized transactions.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/12/2026
First Seen
Valid until: 12/11/2026
Sources
Related Entities
Related Claims
UnverifiedThe x402 protocol attack surface includes Replay Attacks, where if the protocol fails to prevent duplicate transaction submissions, an attacker can replay legitimate transactions to cause repeated charges.77% similarUnverifiedThe core idea of the X402 protocol is to embed payment into the HTTP request process: the server returns a 402 status code with payment details, the agent signs an authorization from a crypto wallet, completes the payment, and retries the request.72% similarUnverifiedAttackers can exploit stolen AI service account credentials to call API interfaces for computing power theft, and such behavior has frequently appeared in terms-of-service violation reports on platforms such as OpenAI and Anthropic.67% similarUnverifiedXSS (Cross-Site Scripting) is one of the most common vulnerabilities in web security, and attackers can steal cookies, session tokens, or other sensitive information by injecting malicious scripts.67% similarUnverifiedA prerequisite for exploiting this vulnerability is that the attacker already has a certain level of Tailscale network access, meaning they are already a legitimate but restricted member of the network.66% similar
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