Agent Eng News Wednesday, October 14, 2026 · Past edition · 12 stories
Retrospective edition reconstructed from later captures. Paper versions may include later updates; coverage labels describe the evidence used.
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Vercel’s two-week Sandbox challenge drew 1,285 reports and uncovered a Linux kernel zero day, alongside trust-boundary flaws that led to concrete changes in how sandbox data and policies are handled.
Why it matters: The practical lesson is to treat guest-supplied data as untrusted, centralize policy decisions, and layer protections against virtualization flaws. The report’s specific demonstration limits also matter: they prevent the findings from being overstated or mistaken for proof that no cross-tenant defects existed.
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