I Traced AgentCore's Package Injection Bug Through 2 Fixes
I was updating my agent sandbox audit scripts over the weekend and stumbled into something that changed how I look at every SDK helper that shells out. AWS's Bedrock AgentCore Python SDK, the thing you use to run code in Amazon's Code Interpreter sandboxes, had the same injection bug fixed twice in the same function. Both fixes were bypassable, each in a different way. This matters right now because BeyondTrust's Phantom Labs team published their full research on it yesterday (Sep 28), and as of this morning I can find no other write-up anywhere: zero threads on Hacker News, zero articles on D
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