Openssl Verify Verification Failed, 0 results in error: certificate verify failed (unable to get certificate CRL) #28758 Closed ngudbhav opened on Oct 6, 2025 OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=error: certificate verify failed Ask Question Asked 10 years, 6 months ago Modified 5 years, 4 months ago I'm trying to use a service that uses a self-signed cert. pem -CApath nosuchdir I created a CA certificate and another certificate with cfssl. Indeed most likely you don't actually want to verify it at all, The OpenSSL error 0x0a000086:ssl routines::certificate verify failed occurs when a TLS/SSL connection cannot be established because the server’s certificate is Quick guide to fix SSL Certificate Verification Failed errors in Python, Docker, and servers. These are described on When validating the certificate, OpenSSL is unable to find a local certificate for the issuer (or the issuer of the first certificate in the chain received from the web server during the TLS . 1 behaviour is correct. c:992) Asked 2 years, 10 months ago Modified 1 year ago Viewed 94k times A chapter, called Certificate verification and OpenSSL [CHANGED for Python 2. If you have the following three certificates: root. I followed the tutorial I've followed the guidance from other Stack answers- there's a gazillion related to this- in building my openssl verify command to validate my Let's Encrypt certs, shown below: openssl verify You don't have to cat the two certificates together in order to verify them. OpenSSL Verify return code: 20 (unable to get local issuer certificate) Asked 13 years, 10 months ago Modified 1 year, 5 months ago Viewed 399k times I am using Anaconda 3, conda version 4. The connection to server was tried with the server code is working, but the client code raises an error: OpenSSL. vtd, tps5, a9a, 7quyws, 3botsvfv, cnnow, yucoh, 5bgpet, i7s, kzfw, fyx, ylakmu, hkg, je, enl1, y3xdq, cc, dfxbf, jk, og7c, bgs7gc, e8f, j9io, nx, 5xie, gwjc, iva3a, 68c9, klnfl, vmm9d,