CVE-2026-107162

{
  "etk_id": "ETK-2026-873",
  "cve_id": "CVE-2026-107162",
  "display_id": "CVE-2026-107162",
  "ghsa_id": "GHSA-p6v9-9m69-qjxm",
  "euvd_id": "EUVD-2026-94316",
  "status": "published",
  "anchor_state": "anchored",
  "title": "OAuth refresh-token authentication bypass in Express Gateway",
  "summary": "Express Gateway through 1.16.11 is affected in its OAuth 2.0 refresh-token grant processing. An attacker with valid client credentials and another user’s refresh-token identifier may obtain an access token for that user and act as them against protected APIs.",
  "mitigation": "Disable the OAuth 2.0 refresh-token grant where feasible, and restrict access to affected token endpoints to trusted clients and networks. Monitor for unexpected token issuance and rotate potentially exposed refresh tokens.",
  "vendor": "ExpressGateway",
  "product": "express-gateway",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 1.16.11"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "express-gateway",
      "purl": null
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 7.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
  "epss_score": 0.0029,
  "epss_percentile": 0.2004,
  "epss_asof": "2026-10-21",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 20.809527483333333,
  "t0_at": "2026-10-07T12:48:18.499000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-07T14:12:47.709567+00:00",
      "days": 0.058671418599537034,
      "is_lower_bound": false,
      "measured_at": "2026-10-07T12:48:18.499000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-07T12:48:18.499000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-07T12:48:18.499000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-107162"
    }
  }
}