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Advisory record · GHSA-jvxp-qmx7-gjpx

Smithy-RS: Allocation of resources without limits in the default aws-smithy-http-server serve() path allows unauthenticated Slowloris denial of service

CVSS 8.7 HighEPSS 0.0075 · 55th percentile

Published by the GitHub Advisory Database at 24 Jul 2026, 22:37 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
aws-smithy-http-servercrates.io<0.66.50.66.5
Identifiers
GHSA-jvxp-qmx7-gjpx · CVE-2026-16756
Weakness (CWE)
CWE-770
Tags
Published
24 Jul 2026
Updated
24 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

aws-smithy-http-server versions before 0.66.5 are vulnerable. A remote, unauthenticated attacker can open many connections and send partial requests that are never completed, which can exhaust server sockets and tasks and cause a denial of service. Upgrade to aws-smithy-http-server 0.66.5; the source lists no workaround other than updating.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (AMZN)
  • CISA KEV Not listed.
  • EPSS 0.0075, the 55th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:18 UTC First seen by agentprime
  2. 31 Oct 2026, 15:18 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.