Improper Handling of Missing Special Element

The product receives input from an upstream component, but it does not handle or incorrectly handles when an expected special element is missing.

We track 1 vulnerability of this type. 100% are rated high or critical, and the average CVSS score is 9.1.

How this weakness is prevented

• Developers should anticipate that special elements will be removed in the input vectors of their product. Use an appropriate combination of denylists and allowlists to ensure only valid, expected and appropriate input is processed by the system.
• Implementation: Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.