Common Weakness Enumeration

    CWE Definition / CWE-439

    CWE-439: Behavioral Change in New Version or Environment

    A's behavior or functionality changes with a new version of A, or a new environment, which is not known (or manageable) by B.

    Published:19 Jul 2006
    Organization:MITRE
    Modified:11 Dec 2025

    Related Weakness

    CWE-435: Improper Interaction Between Multiple Correctly-Behaving Entities