Introduction

InsecureRequestWarning appears when HTTPS certificate verification is disabled. In Python 2.6 era stacks, this often happens because legacy environments rely on old SSL behavior or private certificates. You can suppress the warning, but the safer approach is to fix trust configuration so verification remains enabled.

Why the Warning Appears

Libraries based on urllib3 and requests emit this warning when verify=False is used. The request still executes, but you lose server identity verification.

1import requests
2
3response = requests.get('https://example.internal', verify=False)
4print(response.status_code)

That code may work in development, but it weakens transport security in production.

Preferred Fix: Trust a CA Bundle

Instead of disabling verification, pass a certificate bundle that includes your internal CA. This keeps TLS verification active and removes the warning naturally.

1import requests
2
3CA_BUNDLE = '/etc/ssl/certs/internal-ca-bundle.pem'
4
5response = requests.get(
6    'https://example.internal/api/health',
7    verify=CA_BUNDLE,
8    timeout=10,
9)
10print(response.status_code)

For process wide configuration, set REQUESTS_CA_BUNDLE in the environment.

export REQUESTS_CA_BUNDLE=/etc/ssl/certs/internal-ca-bundle.pem

This is the cleanest long term path for legacy services that cannot upgrade immediately.

Suppress the Warning Only in Controlled Cases

If you must suppress warnings temporarily, scope it narrowly and document the reason. Different legacy versions expose warning control through slightly different imports.

1import requests
2
3try:
4    import urllib3
5    urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
6except Exception:
7    # compatibility path for old requests vendored urllib3
8    from requests.packages.urllib3.exceptions import InsecureRequestWarning
9    requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
10
11response = requests.get('https://example.internal', verify=False, timeout=10)
12print(response.status_code)

Keep this pattern limited to diagnostics, temporary migration windows, or fully isolated networks.

Add Guardrails Around Legacy TLS Calls

Legacy Python services often run in environments with mixed certificate quality. Add explicit logging and endpoint allowlists when verification is disabled.

1ALLOWED_INSECURE_HOSTS = {'example.internal'}
2
3url = 'https://example.internal/status'
4host = url.split('/')[2]
5
6if host not in ALLOWED_INSECURE_HOSTS:
7    raise RuntimeError('insecure HTTPS call blocked for host: %s' % host)
8
9resp = requests.get(url, verify=False, timeout=5)
10print('status=%s bytes=%s' % (resp.status_code, len(resp.text)))

This does not make insecure transport safe, but it reduces accidental spread of unsafe settings.

Migration Guidance for Python 2.6 Systems

Python 2.6 is end of life and lacks modern TLS defaults. If immediate platform migration is not possible, isolate legacy services behind a modern reverse proxy that enforces certificate validation and strong cipher policy.

A practical path:

• terminate external TLS on an up to date proxy
• keep internal communication on restricted network segments
• schedule upgrade milestones for runtime and dependencies
• remove warning suppression once certificate trust is fixed

This gives incremental risk reduction while modernization work proceeds.

Common Pitfalls

The most common mistake is copying verify=False snippets into production code and never removing them. Build checks should fail when insecure requests are detected in protected modules.

Another issue is suppressing all warnings globally. Broad suppression can hide unrelated TLS problems and makes incident diagnosis harder.

A third issue is trusting a certificate file that is not deployed consistently across hosts. If one server misses the bundle, failures become intermittent and difficult to trace. Add a startup health check that validates certificate file presence and readable permissions before serving requests.

Include certificate fingerprint logging during failures so operators can identify mismatched trust stores quickly.

Summary

• InsecureRequestWarning signals disabled HTTPS certificate verification
• Prefer CA bundle configuration instead of turning verification off
• If suppression is unavoidable, scope it narrowly and document ownership
• Add allowlists and logging to control legacy insecure request paths
• Plan migration away from Python 2.6 to restore modern TLS guarantees
• Track every temporary warning suppression with an owner and removal deadline