CVE-2026-74864

{
  "etk_id": "ETK-2026-110",
  "cve_id": "CVE-2026-74864",
  "display_id": "CVE-2026-74864",
  "ghsa_id": "GHSA-fxx9-8vhm-fwhc",
  "euvd_id": "EUVD-2026-89796",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Header-based authentication bypass in sogo_yhn",
  "summary": "Affected sogo_yhn deployments may accept a client-supplied identity header as authenticated, bypassing password checks. An attacker able to send requests through the affected Nginx path could impersonate arbitrary accounts, including privileged ones.",
  "mitigation": "Upgrade sogo_yhn to version 5.8.0~ynh9 or later. Until upgraded, restrict access to the service and ensure untrusted clients cannot supply the identity header.",
  "vendor": "YunoHost-Apps",
  "product": "sogo_yhn",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 5.8.0~ynh9"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "5.8.0~ynh9"
      ],
      "package_name": "sogo_yhn",
      "purl": null
    }
  ],
  "cwes": [
    639
  ],
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0041,
  "epss_percentile": 0.3352,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 28.427899766666666,
  "t0_at": "2026-09-30T12:02:29.340000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-30T12:02:29.340000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-30T12:02:29.340000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74864"
    }
  }
}