{"id":"CVE-2021-23409","aliases":["GHSA-xcf7-q56x-78gh","GO-2022-0233"],"url":"https://o3.security/vulnerability/CVE-2021-23409","summary":"github.com/pires/go-proxyproto vulnerable to DoS via Connection descriptor exhaustion","details":"The package github.com/pires/go-proxyproto before 0.6.0 are vulnerable to Denial of Service (DoS) via creating connections without the proxy protocol header.","published":"2021-07-21T07:15:07.547Z","modified":"2026-07-09T11:24:03.967787Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/pires/go-proxyproto","fixedVersion":"0.6.1"}],"fix":{"url":"https://github.com/pires/go-proxyproto/pull/74","label":"pires/go-proxyproto#74"},"references":[{"type":"ADVISORY","url":"https://github.com/pires/go-proxyproto/releases/tag/v0.6.0"},{"type":"REPORT","url":"https://github.com/pires/go-proxyproto/issues/65"},{"type":"FIX","url":"https://github.com/pires/go-proxyproto/pull/74"},{"type":"FIX","url":"https://github.com/pires/go-proxyproto/pull/74/commits/cdc63867da24fc609b727231f682670d0d1cd346"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMPIRESGOPROXYPROTO-1316439"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T11:24:03.967787Z"}}