{"cve":"CVE-2024-39321","nvd":{"published":"2024-07-05T18:15:32.430","modified":"2026-06-17T07:41:42.670","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-639"],"references":["https://github.com/traefik/traefik/releases/tag/v2.11.6","https://github.com/traefik/traefik/releases/tag/v3.0.4","https://github.com/traefik/traefik/releases/tag/v3.1.0-rc3","https://github.com/traefik/traefik/security/advisories/GHSA-gxrv-wf35-62w9","https://github.com/traefik/traefik/releases/tag/v2.11.6"],"products":["traefik:traefik"],"source":"nvd","synced_at":"2026-10-19T21:52:00.836172422+00:00"},"epss":{"cve":"CVE-2024-39321","score":0.00594,"percentile":0.48386,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-gxrv-wf35-62w9","url":"https://osv.dev/vulnerability/GHSA-gxrv-wf35-62w9","summary":"Bypassing IP allow-lists in traefik via HTTP/3 early data requests in QUIC 0-RTT handshakes","modified":"2026-09-10T03:50:16.750287534Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":["<2.11.6"],"fixed":["2.11.6"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.0.0-beta3 <3.0.4"],"fixed":["3.0.4"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.1.0-rc1 <3.1.0-rc3"],"fixed":["3.1.0-rc3"]}]},{"id":"GO-2024-2973","url":"https://osv.dev/vulnerability/GO-2024-2973","summary":"Bypassing IP allow-lists in traefik via HTTP/3 early data requests in QUIC 0-RTT handshakes in github.com/traefik/traefik","modified":"2026-03-03T04:55:33.607072Z","packages":[{"ecosystem":"Go","name":"github.com/traefik/traefik","purl":"pkg:golang/github.com/traefik/traefik","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v2","purl":"pkg:golang/github.com/traefik/traefik/v2","ranges":["<2.11.6"],"fixed":["2.11.6"]},{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","purl":"pkg:golang/github.com/traefik/traefik/v3","ranges":[">=3.0.0-beta3 <3.0.4",">=3.1.0-rc1 <3.1.0-rc3"],"fixed":["3.0.4","3.1.0-rc3"]}]}],"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."]}