{"id":"CVE-2021-39162","aliases":["BIT-envoy-2021-39162","GHSA-gjcg-vrxg-xmgv","GO-2022-0933"],"url":"https://o3.security/vulnerability/CVE-2021-39162","summary":"Incorrect handling of H2 GOAWAY + SETTINGS frames","details":"Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event. This can lead to a DoS in the presence of untrusted *upstream* servers. 0.15.1 contains an upgraded envoy binary with this vulnerability patched. If only trusted upstreams are configured, there is not substantial risk of this condition being triggered.","published":"2021-09-09T22:15:09.050Z","modified":"2026-08-07T19:47:05.221137Z","cvss":{"score":8.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/pomerium/pomerium","fixedVersion":"0.15.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8"},{"type":"ADVISORY","url":"https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv"},{"type":"ADVISORY","url":"https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T19:47:05.221137Z"}}