Describe the bug

Hello,

as reported in issue #6517, it's not possible to perform https request through http proxy.

I get the following error from our corporate McAfee/Skyhigh Secure Web Gateway HTTP proxy when I make a HTTPS call.

Can't initialize server context:handshakefailed:server state 1:state 9:Application response 500 handshakefailed

Thank you

To Reproduce

Just run the code below

Code snippet

const axios = require('axios');

const url = 'https://ifconfig.me';
const options = {
  proxy: {
    host: 'proxy.xxxx.xxx',
    port: 3128,
    protocol: 'http',
  },
};

axios
  .get(url, options)
  .then((response) => console.log(response))
  .catch((err) => console.error(err));

Expected behavior

Get my external ip

Axios Version

1.13.2

Adapter Version

No response

Browser

No response

Browser Version

No response

Node.js Version

22.16.0

OS

macOS 26.0.1 arm64

Additional Library Versions

Additional context/Screenshots