CVE-2026-109575

{
  "etk_id": "ETK-2026-1412",
  "cve_id": "CVE-2026-109575",
  "display_id": "CVE-2026-109575",
  "ghsa_id": "GHSA-7jqw-rhp8-c8vf",
  "euvd_id": "EUVD-2026-97816",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authentication bypass in HAProxy Data Plane API EE",
  "summary": "HAProxy Data Plane API 2.2.0 through 3.4.3, including corresponding Enterprise Edition releases, can disable authentication for HTTP or UNIX-domain management listeners under a particular TLS configuration. An unauthenticated attacker who can reach one of those listeners may gain administrative API access and read or replace HAProxy configuration data.",
  "mitigation": "Upgrade to 3.4.4, 3.3.9, 3.2.17, 3.0.25, or 2.9.29 as applicable; for Enterprise Edition, install the corresponding backport. Until upgraded, disable or tightly restrict access to HTTP and UNIX-domain management listeners that are not protected by mutual TLS.",
  "vendor": "HAProxy",
  "product": "Data Plane API EE",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.2.0-ee1, <= 2.9.28-ee1",
        ">= 3.0-ee, <= 3.0.24-ee1",
        ">= 3.1-ee, <= 3.2.16-ee1",
        ">= 3.3-ee, <= 3.3.8-ee1",
        ">= 3.4-ee, <= 3.4.3-ee2"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "dataplaneapi",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.2.0, <= 2.9.28",
        ">= 3.0.0, <= 3.0.24",
        ">= 3.1.0, <= 3.2.16",
        ">= 3.3.0, <= 3.3.8",
        ">= 3.4.0, <= 3.4.3"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "dataplaneapi-ee",
      "purl": null
    }
  ],
  "cwes": [
    306
  ],
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0036,
  "epss_percentile": 0.2783,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 64.57181628333333,
  "t0_at": "2026-10-12T19:32:13.313000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-12T19:32:13.313000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-12T19:32:13.313000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-109575"
    }
  }
}