A validation-to-dispatch mismatch happens when software checks input in one place, but later sends that same input through a different execution path. The original check may approve a value based on one set of rules, while the dispatcher, router, or downstream handler interprets it differently.
This matters in cyber security because attackers look for seams between layers. A request can appear safe at the front end, then reach a database query, file operation, or privileged action through a path that was not covered by the original validation. In real attacks, these mismatches can turn a minor input flaw into SQL injection, authorization bypass, or even remote code execution. Defenses include validating at the point of use, keeping routing and authorization logic consistent, using parameterized queries, and reducing complex branching in request handling.