Common Weakness Enumeration
CWE Definition / CWE-758
CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.
Published:3 Mar 2009
Organization:MITRE
Modified:11 Dec 2025
Related Weakness
CWE-710: Improper Adherence to Coding Standards
