Picklescan fails to detect the `numpy.f2py.crackfortran. eval length` gadget within pickle ` reduce ` methods. This allows attackers to craft malicious pickle files that execute arbitrary Python code when loaded by users who rely on Picklescan's safety validation. The issue occurs because a crafted object can return the ` eval length` function with attacker-controlled arguments; while the scan reports the file as safe, the `pickle.load()` function triggers the execution of the code.