CVE-2026-16756

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.

  • Published Jul 23, 2026
  • CVSS 8.7 high
  • 0.8% chance of exploitation in the next 30 days (EPSS)

Affected software

In the news

CVE-2026-16756 at the National Vulnerability Database