{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-23T19:46:59.600","vulnerabilities":[{"cve":{"id":"CVE-2021-32780","sourceIdentifier":"security-advisories@github.com","published":"2021-08-24T21:15:09.947","lastModified":"2026-06-17T03:53:36.990","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invalid state transition from CLOSED to DRAINING. A sequence of H/2 frames delivered by an untrusted upstream server will result in Denial of Service in the presence of untrusted **upstream** servers. Envoy versions 1.19.1, 1.18.4 contain fixes to stop processing of pending H/2 frames after connection transition to the CLOSED state."},{"lang":"es","value":"Envoy es un proxy L7 de código abierto y un bus de comunicación diseñado para grandes arquitecturas modernas orientadas a servicios. En las versiones afectadas, Envoy lleva a cabo una transición de una conexión H/2 al estado CLOSED cuando recibe una trama GOAWAY sin ningún flujo pendiente. El estado de la conexión pasa a DRAINING cuando recibe una trama SETTING con el parámetro SETTINGS_MAX_CONCURRENT_STREAMS ajustado a 0. Recibiendo estas dos tramas en el mismo evento de E/S resulta en una terminación anormal del proceso Envoy debido a una transición de estado no válida de CLOSED a DRAINING. Una secuencia de tramas H/2 entregada por un servidor upstream no confiable resultará en una Denegación de Servicio en presencia de servidores **upstream** no confiables. Envoy versiones 1.19.1 y 1.18.4, contienen correcciones para detener el procesamiento de las tramas H/2 pendientes después de la transición de la conexión al estado CLOSED."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"envoyproxy","product":"envoy","versions":[{"version":">= 1.19.0, < 1.19.1","status":"affected"},{"version":">= 1.18.0, < 1.18.4","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":4.0},{"source":"nvd@nist.gov","type":"Primary","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}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-754"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-754"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.18.0","versionEndExcluding":"1.18.4","matchCriteriaId":"D7376E28-9915-4CA1-A5DB-40874D10E781"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:*","matchCriteriaId":"1968AA35-60E2-4A00-84A0-617738B55D33"}]}]}],"references":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}