{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-10-01T00:26:51.846","vulnerabilities":[{"cve":{"id":"CVE-2024-30255","sourceIdentifier":"security-advisories@github.com","published":"2024-04-04T20:15:08.983","lastModified":"2026-06-17T07:26:36.947","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections."},{"lang":"es","value":"Envoy es un proxy de servicio y borde de código abierto, nativo de la nube. La pila de protocolos HTTP/2 en las versiones de Envoy anteriores a 1.29.3, 1.28.2, 1.27.4 y 1.26.8 son vulnerables al agotamiento de la CPU debido a la inundación de tramas de CONTINUACIÓN. El códec HTTP/2 de Envoy permite al cliente enviar un número ilimitado de tramas de CONTINUACIÓN incluso después de exceder los límites del mapa de encabezado de Envoy. Esto permite a un atacante enviar una secuencia de tramas CONTINUATION sin que el bit END_HEADERS esté configurado causando la utilización de la CPU, consumiendo aproximadamente 1 núcleo por cada 300 Mbit/s de tráfico y culminando en una denegación de servicio por agotamiento de la CPU. Los usuarios deben actualizar a la versión 1.29.3, 1.28.2, 1.27.4 o 1.26.8 para mitigar los efectos de la inundación de CONTINUACIÓN. Como workaround, deshabilite el protocolo HTTP/2 para conexiones descendentes."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"envoyproxy","product":"envoy","versions":[{"version":">= 1.29.0, < 1.29.3","status":"affected"},{"version":">= 1.28.0, < 1.28.2","status":"affected"},{"version":">= 1.27.0, < 1.27.4","status":"affected"},{"version":"< 1.26.8","status":"affected"}]}]},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","affectedData":[{"vendor":"envoyproxy","product":"envoy","defaultStatus":"unknown","cpes":["cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"],"versions":[{"version":"1.29.0","lessThan":"1.29.3","versionType":"custom","status":"affected"},{"version":"1.28.0","lessThan":"1.28.2","versionType":"custom","status":"affected"},{"version":"1.27.0","lessThan":"1.27.4","versionType":"custom","status":"affected"},{"version":"0","lessThan":"1.26.8","versionType":"custom","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:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4},{"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}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2024-04-08T14:58:49.679014Z","id":"CVE-2024-30255","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-390"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionEndExcluding":"1.26.8","matchCriteriaId":"F87C4206-D5D5-48E3-9EAC-ACA5D008309B"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.27.0","versionEndExcluding":"1.27.4","matchCriteriaId":"CF0DE178-939D-4E7B-B0EF-E42147B9EEC0"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.28.0","versionEndExcluding":"1.28.2","matchCriteriaId":"8B67040F-7B64-4A8B-A13B-E8A9CD473261"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.29.0","versionEndExcluding":"1.29.3","matchCriteriaId":"4088E7B5-1E46-43E3-8E9E-1B01C5070642"}]}]}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2024/04/03/16","source":"security-advisories@github.com","tags":["Mailing List","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/05/3","source":"security-advisories@github.com","tags":["Mailing List"]},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/03/16","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/05/3","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List"]},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/421644","source":"af854a3a-2127-422b-91ae-364da2661108"}]}}]}