VNX-478 – Missing Default Case in Multiple Condition Expression

Overview

VNX-478 maps to CWE-478: Missing Default Case in Multiple Condition Expression. Detects source patterns associated with CWE-478 (Missing Default Case in Multiple Condition Expression). Each finding should be manually reviewed for exploitability in context.

Severity: Low | CWE: CWE-478 | Languages: c, cpp, go, java

Why This Matters

This weakness class (Missing Default Case in Multiple Condition Expression) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-478 and surfaces them for review. Each finding should be evaluated in context — the rule catches the pattern, not the context.

What Gets Flagged

// FLAGGED: contains 'switch (' pattern
switch (

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-478 or a false positive.
  2. Replace the flagged construct with a documented safe alternative appropriate to your language and framework.
  3. For confirmed false positives, add a # vulnetix-ignore: VNX-478 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References