VNX-839 – Numeric Range Comparison Without Minimum Check

Overview

VNX-839 maps to CWE-839: Numeric Range Comparison Without Minimum Check. Detects source patterns associated with CWE-839 (Numeric Range Comparison Without Minimum Check). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-839 | Languages: python

Why This Matters

This weakness class (Numeric Range Comparison Without Minimum Check) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-839 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 'if x < ' pattern
if x <

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-839 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-839 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References