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

AWS ยท 2026-07-23

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Technical Details

Affected Versions <= 0.66.4
Regions all
CVE IDs CVE-2026-16756
Migration Required Yes
Cost Impact Neutral
IaC Impact High

What This Means

For DevOps Teams

Update the aws-smithy-http-server to version 0.66.5 to address the CVE-2026-16756 vulnerability and prevent potential denial of service attacks.

For Platform Teams

Deploy the latest aws-smithy-http-server version 0.66.5 to enhance the security posture of your platform and protect against unauthenticated denial of service attacks.

For Executives

Implement the upgrade to aws-smithy-http-server version 0.66.5 to mitigate the risk of unauthenticated denial of service attacks, ensuring the security and reliability of your services.

Source

View original AWS announcement โ†’

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