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interesting · Research — privilege

A workspace writer can redirect an approved Claude Code edit outside the project through a symlink race.

Affects

Claude Code, Anthropic's local coding-agent command-line application.

The checked path can be atomically replaced before write-time resolution, causing Claude Code to modify an attacker-selected file with the session user’s authority.

Detail and 1 source

The boundary failure is real but requires an adversarial concurrent workspace writer to win the race.

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Tuesday, October 6, 2026