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Cybersecurity watch

Critical x402 SDK Flaw Could Let Malicious APIs Drain AI Agents’ Token Balances

The Hacker News

Why it matters

This page references a cybersecurity signal published by The Hacker News. It helps CISOs, DPOs, IT leaders, infrastructure teams, SMBs and enterprise accounts track vulnerabilities, alerts and trends that may affect security, compliance or system resilience.

Unix Consulting read

This signal relates to AI usage, assistants, models or data handled by these systems. It should be read through a governance lens: which data enters the tool, which access is granted and which traces remain auditable.

Watch points

  • Sensitive data sent to AI tools
  • Connectors, permissions and access logs
  • Internal rules for assistants, agents and local LLMs

Recommended action

Review handled data, connectors and available logs before authorizing or expanding the AI usage concerned.

Relevant for

DPOs, CISOs, IT leaders, innovation teams, exposed business units and AI compliance owners.

Source summary

AI agents paying for API calls with the x402 SDKs could sign a payment for their full balance of a supported token if a malicious API asked for it, security firm V12 said on October 22. The cause was the SDKs' default client, which set no spending limit until releases on August 18 added one. The risk was limited to agents who automatically signed payments...

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