{"id":"CVE-2020-8659","title":"CNCF Envoy through 1.13.0 may consume excessive amounts of memory when proxying HTTP/1.1 requests or responses with many small (i.e","summary":"CNCF Envoy through 1.13.0 may consume excessive amounts of memory when proxying HTTP/1.1 requests or responses with many small (i.e. 1 byte) chunks.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"envoyproxy","product":"envoy","affected":["envoy <= 1.13.0","openshift_service_mesh = 1.0","debian_linux = 9.0"],"published":"2020-03-04","updated":"2026-10-02","sourceUpdated":"2026-10-02T21:00:25.163","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-8659","references":[{"url":"https://access.redhat.com/errata/RHSA-2020:0734","label":"cve@mitre.org"},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qv","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00025.html","label":"cve@mitre.org"},{"url":"https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history","label":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0734","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-jwcm-4pwp-c2qv","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00025.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01887,"epssPercentile":0.7879,"ingestedAt":"2026-10-02T22:33:09.805Z","slug":"CVE-2020-8659","body":"## Overview\n\nCNCF Envoy through 1.13.0 may consume excessive amounts of memory when proxying HTTP/1.1 requests or responses with many small (i.e. 1 byte) chunks.\n\n## Affected\n\n- `envoy <= 1.13.0`\n- `openshift_service_mesh = 1.0`\n- `debian_linux = 9.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}