VNX-756 – Missing Custom Error Page

Overview

VNX-756 maps to CWE-756: Missing Custom Error Page. Detects source patterns associated with CWE-756 (Missing Custom Error Page). Each finding should be manually reviewed for exploitability in context.

Severity: Low | CWE: CWE-756 | Languages: python

Why This Matters

This weakness class (Missing Custom Error Page) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-756 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 '@app.route' pattern
@app.route

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-756 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-756 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References