{"cve":"CVE-2021-39162","nvd":{"published":"2021-09-09T22:15:09.050","modified":"2026-06-17T04:03:13.447","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","score":8.6},"cwes":["CWE-754"],"references":["https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8","https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv","https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ","https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8","https://github.com/pomerium/pomerium/security/advisories/GHSA-gjcg-vrxg-xmgv"],"products":["envoyproxy:envoy","pomerium:pomerium"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-39162","score":0.01638,"percentile":0.76346,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gjcg-vrxg-xmgv","url":"https://osv.dev/vulnerability/GHSA-gjcg-vrxg-xmgv","summary":"Incorrect handling of H2 GOAWAY + SETTINGS frames","modified":"2026-02-04T02:55:29.909324Z","packages":[{"ecosystem":"Go","name":"github.com/pomerium/pomerium","purl":"pkg:golang/github.com/pomerium/pomerium","ranges":["<0.15.1"],"fixed":["0.15.1"]}]},{"id":"GO-2022-0933","url":"https://osv.dev/vulnerability/GO-2022-0933","summary":"Incorrect handling of H2 GOAWAY + SETTINGS frames in github.com/pomerium/pomerium","modified":"2026-03-03T04:52:30.897573Z","packages":[{"ecosystem":"Go","name":"github.com/pomerium/pomerium","purl":"pkg:golang/github.com/pomerium/pomerium","ranges":["<0.15.1"],"fixed":["0.15.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}