VNX-444 – Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Overview

VNX-444 maps to CWE-444: Inconsistent Interpretation of HTTP Requests (‘HTTP Request/Response Smuggling’). Detects source patterns associated with CWE-444 (Inconsistent Interpretation of HTTP Requests (‘HTTP Request/Response Smuggling’)). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-444 | Languages: node, python

Why This Matters

This weakness class (Inconsistent Interpretation of HTTP Requests (‘HTTP Request/Response Smuggling’)) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-444 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 'Transfer-Encoding:' pattern
Transfer-Encoding:

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-444 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-444 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References