CVE-2026-16756: Aws Aws-Smithy-HTTP-Server

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Missing connection and header-read timeouts and the absence of a concurrent-connection cap in the default serve() path of Amazon aws-smithy-http-server might allow remote attackers to cause a denial of service by opening many connections and sending partial requests that are never completed, exhausting server sockets and tasks. To mitigate this issue, users should upgrade to aws-smithy-http-server 0.66.5 or later.

Affected products

• Aws Aws-Smithy-HTTP-Server: up to and including 0.66.4

Published 2026-07-23. Last modified 2026-08-12.