python network_error ai_generated true

aiohttp.client_exceptions.ClientConnectorSSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed

ID: python/aiohttp-client-connector-ssl-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-07-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.9 active — — —
3.10 active — — —

Root Cause

The SSL certificate of the remote server is invalid, expired, or not trusted by the system's CA bundle.

generic

中文

远程服务器的 SSL 证书无效、已过期或不受系统 CA 包信任。

Workarounds

  1. 80% success Update system CA certificates 
    pip install certifi
# or update OS CA bundle
  2. 90% success Provide a custom SSL context with trusted certificates 
    import ssl
ssl_context = ssl.create_default_context(cafile='/path/to/cert.pem')
async with aiohttp.ClientSession(connector=aiohttp.TCPConnector(ssl=ssl_context)) as session:

Dead Ends

Common approaches that don't work:

  1. Disabling SSL verification entirely with ssl=False 30% fail

    This bypasses security and may lead to man-in-the-middle attacks; also not recommended for production.

  2. Using a custom SSL context without proper certificates 60% fail

    If the custom context is not configured correctly, the error persists.