https://jens.dev/tags/github-actions.html Recent content in Github-Actions on My personal blog Hugo en-us Wed, 10 Jun 2026 00:00:00 +0000 https://jens.dev/2026/06/10/letsencrypt-gen-y.html Wed, 10 Jun 2026 00:00:00 +0000 https://jens.dev/2026/06/10/letsencrypt-gen-y.html <p>A few days ago I ran into a surprisingly tricky TLS issue while setting up automated tests for a service running behind Let&rsquo;s Encrypt certificates.</p> <p>The symptoms were confusing at first:</p> <ul> <li>Browsers accepted the certificate.</li> <li><code>curl --insecure</code> worked.</li> <li>The certificate looked perfectly valid.</li> <li>Yet GitHub Actions consistently failed with:</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#272822;background-color:#fafafa;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-text" data-lang="text"><span style="display:flex;"><span>SSL certificate problem: unable to get local issuer certificate </span></span></code></pre></div><p>At first glance this looked like a classic missing intermediate certificate problem.</p>