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<h1 class="lined-header"><span>Migrating from Cowboy 2.9 to 2.10</span></h1>
<p>Cowboy 2.10 is a maintenance release adding support for Erlang/OTP 26. The main change is a Cowlib update to fix a compilation error that only occurs starting from OTP 26.</p>
<p>Cowboy 2.10 requires Erlang/OTP 22.0 or greater.</p>
<h2 id="_features_added">Features added</h2>
<ul><li>Add support for <code>Default</code> value of SameSite cookie attribute.
</li>
<li>Add support for the <code>stale-*</code> cache-control directives from RFC 5861.
</li>
<li>Update Cowlib to 2.12.1.
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<h2 id="_bugs_fixed">Bugs fixed</h2>
<ul><li>Fix a compilation error in Cowlib when using Erlang/OTP 26.
</li>
<li>Fix data sent after RST_STREAM in HTTP/2 in rare cases.
</li>
<li>Fix parsing of RST_STREAM frames to properly handle frames that have a valid length but were not fully received yet.
</li>
<li>Remove the obsolete <code>Version</code> cookie attribute.
</li>
<li>Handle more edge cases for cookie parsing based on updates to the RFC 6265bis draft.
</li>
<li>Make Basic auth parsing ignore unknown authentication parameters and generally update the code to conform to RFC 7617.
</li>
<li>Fix URI template reserved expansion of %-encoded.
</li>
<li>Update structured headers implementation to RFC 8941.
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Performance
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Migrating from Cowboy 2.8 to 2.9
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Cowboy
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<li><a href="/docs/en/cowboy/2.13/guide">2.13</a></li>
<li><a href="/docs/en/cowboy/2.12/guide">2.12</a></li>
<li><a href="/docs/en/cowboy/2.11/guide">2.11</a></li>
<li><a href="/docs/en/cowboy/2.10/guide">2.10</a></li>
<li><a href="/docs/en/cowboy/2.9/guide">2.9</a></li>
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<li><a href="/docs/en/cowboy/2.6/guide">2.6</a></li>
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