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One Check, Four Paths: What the Docker Sandboxes sbx cp Symlink Bug Teaches About Guarding Every Position

TL;DR CVE-2026-103916 is a symlink escape in the sbx cp command of Docker Sandboxes (CWE-59). A sandboxed agent plants a symlink inside the shared workspace, and a later, user-initiated copy reads or writes a host file outside it. Affected: versions 0.28.0 up to but not including 0.51.0. Fixed in 0…

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  1. 2026-11-08 14:23 · DEV Community — AI
    One Check, Four Paths: What the Docker Sandboxes sbx cp Symlink Bug Teaches About Guarding Every Position

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