{"cve":"CVE-2019-14243","nvd":{"published":"2019-07-23T22:15:11.643","modified":"2026-06-17T02:18:01.780","status":"Modified","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","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:N/A:H","score":7.5},"cwes":["CWE-20"],"references":["https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014","https://github.com/mastercactapus/caddy-proxyprotocol/issues/8","https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac","https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101","https://github.com/mastercactapus/proxyprotocol/issues/1"],"products":["haproxy:proxyprotocol"],"source":"nvd","synced_at":"2026-10-19T20:58:11.797917892+00:00"},"epss":{"cve":"CVE-2019-14243","score":0.04295,"percentile":0.91133,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-85c5-ccm8-vr96","url":"https://osv.dev/vulnerability/GHSA-85c5-ccm8-vr96","summary":"mastercactapus proxyprotocol vulnerable to denial of service","modified":"2023-11-08T04:01:09.525074Z","packages":[{"ecosystem":"Go","name":"github.com/mastercactapus/proxyprotocol","purl":"pkg:golang/github.com/mastercactapus/proxyprotocol","ranges":["<0.0.2"],"fixed":["0.0.2"]}]},{"id":"GO-2023-1923","url":"https://osv.dev/vulnerability/GO-2023-1923","summary":"Panic when handling invalid HAProxy PROXY v2 request in github.com/mastercactapus/proxyprotocol","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/mastercactapus/proxyprotocol","purl":"pkg:golang/github.com/mastercactapus/proxyprotocol","ranges":["<0.0.2"],"fixed":["0.0.2"]}]}],"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."]}