Grackle has command/argument injection in the git worktree executor that enables RCE on provisioned hosts via an unsanitized task branch name (shell:true)
## Summary The default git executor used for all worktree operations spawns `git` through a shell, and the untrusted task **branch** name flows into the command unsanitized. A caller able to reach the PowerLine `SpawnSession` RPC (a malicious or compromised agent acting through the orchestration layer, or any client able to spawn a task) can achieve **arbitrary command execution** as the PowerLine user on every provisioned environment (SSH host, Docker container, or Codespace), escaping the agent sandbox. This advisory bundles two related defects in `worktree.ts` (audit findings **F1** and **F13**). ## Affected versions `@grackle-ai/runti
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