python network_error ai_generated partial

requests.exceptions.SSLError: HTTPSConnectionPool(host='incomplete.example.com', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get issuer certificate')))

ID: python/requests-connectionerror-ssl-certificate-verify-failed-unable-to-get-issuer

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2026-01-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The server did not send the intermediate CA certificate, and the client cannot build the trust chain.

generic

中文

服务器未发送中间CA证书，客户端无法构建信任链。

Workarounds

  1. 95% success Configure the server to send the full certificate chain 
    Contact server administrator to include intermediate CA certificates in the server configuration.
  2. 85% success Provide the missing intermediate CA certificate locally 
    requests.get('https://incomplete.example.com', verify='/path/to/intermediate-ca.crt')

Dead Ends

Common approaches that don't work:

  1. Disabling SSL verification 70% fail

    Bypasses security; does not solve the missing intermediate certificate.

  2. Manually downloading the certificate and using it incorrectly 80% fail

    If the certificate chain is incomplete, the verification still fails.