Type Assertion

How Unsafe Deserialization into interface{} happens in Go and how to fix it

A high-severity unsafe deserialization vulnerability was discovered in `web/session/session.go` where a type assertion on an `interface{}` value was performed without checking success, enabling arbitrary data structures to flow into the application. The fix adds a two-branch type assertion that returns `nil` when the cast fails, preventing unexpected types from propagating. This pattern is common in Go session management code and is easy to overlook during code review.