{"id":"CVE-2026-16756","sourceIdentifier":"ff89ba41-3aa1-4d27-914a-91399e9639e5","published":"2026-07-23T19:16:53.657","lastModified":"2026-10-24T13:10:00.147","vulnStatus":"Awaiting Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"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.\n\n\n\nTo mitigate this issue, users should upgrade to aws-smithy-http-server 0.66.5 or later."},{"lang":"es","value":"La falta de tiempos de espera para la conexión y la lectura de encabezados y la ausencia de un límite de conexiones concurrentes en la ruta ’serve()’ predeterminada de Amazon aws-smithy-http-server podría permitir a atacantes remotos causar una denegación de servicio al abrir muchas conexiones y enviar solicitudes parciales que nunca se completan, agotando los sockets del servidor y las tareas.\n\nPara mitigar este problema, los usuarios deberían actualizar a aws-smithy-http-server 0.66.5 o posterior."}],"affected":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","affectedData":[{"vendor":"AWS","product":"aws-smithy-http-server","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"0.66.4","versionType":"custom","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-12T19:03:10.789235Z","id":"CVE-2026-16756","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"ff89ba41-3aa1-4d27-914a-91399e9639e5","type":"Secondary","description":[{"lang":"en","value":"CWE-770"}]}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-064-aws/","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://crates.io/crates/aws-smithy-http-server/0.66.5","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-jvxp-qmx7-gjpx","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"}]}