{"id":"CVE-2024-39321","aliases":["GHSA-gxrv-wf35-62w9","GO-2024-2973"],"url":"https://o3.security/vulnerability/CVE-2024-39321","summary":"Traefik vulnerable to bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes","details":"Traefik is an HTTP reverse proxy and load balancer. Versions prior to 2.11.6, 3.0.4, and 3.1.0-rc3 have a vulnerability that allows bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes sent with spoofed IP addresses. Versions 2.11.6, 3.0.4, and 3.1.0-rc3 contain a patch for this issue. No known workarounds are available.","published":"2024-07-05T17:32:06.688Z","modified":"2026-08-08T03:48:04.620440498Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","fixedVersion":"2.11.6"},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.0.4"},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.1.0-rc3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v2.11.6"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.0.4"},{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.1.0-rc3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39321.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-gxrv-wf35-62w9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39321"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:48:04.620440498Z"}}