{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.23",
        "name": "caddy",
        "purl": "pkg:apk/alpine/caddy?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.10.2"
            },
            {
              "fixed": "2.11.2-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Alpine:v3.24",
        "name": "caddy",
        "purl": "pkg:apk/alpine/caddy?arch=source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.10.2"
            },
            {
              "fixed": "2.11.1-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP `host` request matcher is documented as case-insensitive, but when configured with a large host list (\u003e100 entries) it becomes case-sensitive due to an optimized matching path. An attacker can bypass host-based routing and any access controls attached to that route by changing the casing of the `Host` header. Version 2.11.1 contains a fix for the issue.",
  "id": "ALPINE-CVE-2026-27588",
  "modified": "2026-11-03T06:18:00.977756341Z",
  "published": "2026-02-24T17:29:04.163Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security.alpinelinux.org/vuln/CVE-2026-27588"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-27588"
  ]
}