Posts tagged “certificates”

OpsCanopy·August 29, 2026·9 min read

x509: certificate signed by unknown authority — why it works in your browser but not in Go, curl or Docker

The full error, what it actually means, and the four causes ranked by how often they bite. Includes the one-line openssl check that tells you whether an intermediate is missing.

• tls
• certificates
• docker
• go
• security