Is CVE-2026-16756 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-16756?

CVE-2026-16756 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-16756

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.