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<a href="https://gitlab.com/ogarcia">Óscar García Amor</a> created an issue: <a href="https://gitlab.com/gnutls/gnutls/-/issues/1746">#1746</a>
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<h2 dir="auto" style="margin-top: 0; margin-bottom: 10px;" align="initial">
<a href="#description-of-problem" aria-hidden="true" class="anchor" id="user-content-description-of-problem" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>Description of problem:</h2>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">TLS handshake fails when connecting to specific HTTPS servers after upgrading OpenSSL from 3.5.4 to 3.6.0.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">It is definitely a problem caused by updating OpenSSL to 3.6.0 because if you roll back to 3.5.4, everything works again.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">This was initially detected in WebKit applications, so there <a href="https://bugs.webkit.org/show_bug.cgi?id=300584" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">is a related bug in Bugzilla</a>.</p>
<h2 dir="auto" style="margin-top: 20px; margin-bottom: 10px;" align="initial">
<a href="#version-of-gnutls-used" aria-hidden="true" class="anchor" id="user-content-version-of-gnutls-used" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>Version of gnutls used:</h2>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">3.8.10</p>
<h2 dir="auto" style="margin-top: 20px; margin-bottom: 10px;" align="initial">
<a href="#distributor-of-gnutls-eg-ubuntu-fedora-rhel" aria-hidden="true" class="anchor" id="user-content-distributor-of-gnutls-eg-ubuntu-fedora-rhel" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)</h2>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Arch Linux</p>
<h2 dir="auto" style="margin-top: 20px; margin-bottom: 10px;" align="initial">
<a href="#how-reproducible" aria-hidden="true" class="anchor" id="user-content-how-reproducible" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>How reproducible:</h2>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Use Arch Linux (up to date as of October 2025).</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Ensure OpenSSL 3.6.0 is installed.</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Install and configure nginx with a simple self-signed TLS certificate.</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Launch any GnuTLS client such Epiphany, wget or aria2.</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Open <a href="https://localhost/" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://localhost/</a>.</li>
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<h2 dir="auto" style="margin-top: 20px; margin-bottom: 10px;" align="initial">
<a href="#actual-results" aria-hidden="true" class="anchor" id="user-content-actual-results" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>Actual results:</h2>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Epiphany shows an SSL/TLS error 'Peer failed to perform TLS handshake: Error decoding the received TLS packet.'</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">In wget or aria2 similar error 'GnuTLS: Error decoding the received TLS packet'.</p>
<h2 dir="auto" style="margin-top: 20px; margin-bottom: 10px;" align="initial">
<a href="#expected-results" aria-hidden="true" class="anchor" id="user-content-expected-results" style="margin-top: 0; margin-left: -20px; text-decoration: none; outline: none; position: absolute; width: 20px;"></a>Expected results:</h2>
<p dir="auto" style="color: #3a383f; margin: 0;" align="initial">Everything should work fine, regardless of the version of OpenSSL installed.</p>
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