{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-17T06:37:58.241","vulnerabilities":[{"cve":{"id":"CVE-2021-43826","sourceIdentifier":"security-advisories@github.com","published":"2022-02-22T23:15:10.957","lastModified":"2024-11-21T06:29:52.647","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions of Envoy a crash occurs when configured for :ref:`upstream tunneling <envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config>` and the downstream connection disconnects while the the upstream connection or http/2 stream is still being established. There are no workarounds for this issue. Users are advised to upgrade."},{"lang":"es","value":"Envoy es un proxy de borde y servicio de código abierto, diseñado para aplicaciones nativas de la nube. En las versiones afectadas de Envoy se produce un bloqueo cuando es configurada para :ref:\"upstream tunneling (envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config)\" y la conexión de bajada es desconectada mientras sigue estableciendo la conexión de subida o el flujo http/2. No se presentan medidas de mitigación para este problema. Es recomendado a usuarios actualizar"}],"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: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},{"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:M/Au:N/C:N/I:N/A:P","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"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-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionEndExcluding":"1.18.6","matchCriteriaId":"0EFC93D0-C206-417C-81D0-F18145E3D768"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.19.0","versionEndExcluding":"1.19.3","matchCriteriaId":"2812AC62-44B5-4077-862D-A221CD88981D"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.20.0","versionEndExcluding":"1.20.2","matchCriteriaId":"F5441B2D-F807-4ED9-AFB9-ED4DE07CE5F8"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.21.0","versionEndExcluding":"1.21.1","matchCriteriaId":"83895D03-DAD1-4893-8A1C-F9143DEEC172"}]}]}],"references":[{"url":"https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf","source":"security-advisories@github.com","tags":["Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Third Party Advisory"]}]}}]}