https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 28 Sep 2026 21:30:10 +0000 https://vulnerability.circl.lu/vuln/cve-2026-9545 <p><strong>Affected:</strong> curl</p> <p>In this scenario, libcurl first uses a proper HTTP/3 server for the initial transfers, and when it makes a second transfer to the same site it has been replaced by the attacker&#39;s impostor machine - without a valid certificate.</p> <p>When libcurl returns to the hostname the second time with a cached SSL session (`CURLOPT_SSL_SESSIONID_CACHE` is not disabled) and early data enabled (the `CURLSSLOPT_EARLYDATA` bit is set in `CURLOPT_SSL_OPTIONS`), libcurl might send off the second request&#39;s bytes on that new connection *before* enforcing the certificate verification failure. Potentially leaking sensitive information.</p> <p><strong>Affected:</strong> curl</p> <p>In this scenario, libcurl first uses a proper HTTP/3 server for the initial transfers, and when it makes a second transfer to the same site it has been replaced by the attacker&#39;s impostor machine - without a valid certificate.</p> <p>When libcurl returns to the hostname the second time with a cached SSL session (`CURLOPT_SSL_SESSIONID_CACHE` is not disabled) and early data enabled (the `CURLSSLOPT_EARLYDATA` bit is set in `CURLOPT_SSL_OPTIONS`), libcurl might send off the second request&#39;s bytes on that new connection *before* enforcing the certificate verification failure. Potentially leaking sensitive information.</p> https://vulnerability.circl.lu/vuln/cve-2026-9545