AWS and Vercel Patch Critical Flaws in AI Agent Platforms Allowing Unauthorized Tool Execution
AWS and Vercel have addressed multiple critical vulnerabilities in their AI agent platforms that enabled unauthorized execution of tools without legitimate model approval. The issues, grouped under the CoreBreak pattern, allowed attackers to bypass AI authorization checks by injecting crafted tool calls that the infrastructure misinterpreted as model-approved actions. In AWS, CVE-2026-18830 affected the InvokeHarness API in Amazon Bedrock AgentCore, permitting authenticated users to trigger sensitive tools directly. Vercel faced two separate flaws tracked as CVE-2026-64650 and CVE-2026-64651 that let sandboxed code reach host system tools, potentially exposing secrets or cloud APIs. No public evidence of active exploitation has been confirmed yet. Organizations are advised to apply updates immediately, restrict available tools for agents, and treat all external inputs as potentially malicious.
BoletimSecAug 7, 2026Translated from Portuguese