CVE-2026-16756 – Allocation of resources without limits in the default aws-smithy-http-server serve() path allows unauthenticated Slowloris denial of service

CVE ID :CVE-2026-16756

Published : July 23, 2026, 7:16 p.m. | 32 minutes ago

Description :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.

Severity: 8.7 | HIGH

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