{"id":"BIT-haproxy-2021-39242","details":"An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.","aliases":["CVE-2021-39242"],"modified":"2026-09-08T08:47:51.698783429Z","published":"2024-03-06T10:54:26.008Z","database_specific":{"cpes":["cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*"],"severity":"High"},"references":[{"type":"WEB","url":"https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=b5d2b9e154d78e4075db163826c5e0f6d31b2ab1"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4960"},{"type":"WEB","url":"https://www.mail-archive.com/haproxy%40formilux.org/msg41041.html"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39242"}],"affected":[{"package":{"name":"haproxy","ecosystem":"Bitnami","purl":"pkg:bitnami/haproxy"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.2.0"},{"fixed":"2.2.16"},{"introduced":"2.3.0"},{"fixed":"2.3.13"},{"introduced":"2.4.0"},{"fixed":"2.4.3"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/haproxy/BIT-haproxy-2021-39242.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}],"schema_version":"1.9.0"}