CVE-2026-40157: PraisonAI vulnerable to arbitrary file write via path traversal in `praisonai recipe unpack`

cmd_unpack in the recipe CLI extracts .praison tar archives using raw tar.extract() without validating archive member paths. A .praison bundle containing ../../ entries will write files outside the intended output directory. An attacker who distributes a malicious bundle can overwrite arbitrary files on the victim’s filesystem when they run praisonai recipe unpack.