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CVE-2026-57136 is an allowlist bypass vulnerability in the npm praisonai package affecting SandboxExecutor and CommandValidator logic. The vulnerable design validates only the first whitespace-delimited token of a supplied command string against an allowedCommands policy, but subsequently executes the entire untrusted string through a shell interpreter using a shell-string execution path. This mismatch allows an attacker to prepend an allowed command token and then append shell metacharacters or chained commands, bypassing the intended command restriction. As a result, command validation can be defeated and arbitrary shell commands can be executed in the security context of the PraisonAI process.
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