CVE-2026-18036

{
  "etk_id": "ETK-2026-322",
  "cve_id": "CVE-2026-18036",
  "display_id": "CVE-2026-18036",
  "ghsa_id": "GHSA-frjj-v5w4-68pc",
  "euvd_id": "EUVD-2026-91317",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Secret-dependent timing in Bouncy Castle Java NTRU",
  "summary": "bcprov versions before 1.86 contain timing-variable arithmetic in NTRU processing. An attacker able to collect relevant timing measurements from NTRU operations may infer information about a private key.",
  "mitigation": "Upgrade bcprov to version 1.86 or later. Restrict exposure of NTRU operations to untrusted parties until the upgrade is complete.",
  "vendor": "Legion of the Bouncy Castle Inc.",
  "product": "BC-JAVA",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.73, < 1.86"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.86"
      ],
      "package_name": "bcprov",
      "purl": null
    }
  ],
  "cwes": [
    208
  ],
  "cvss_score": 8.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/U:Amber",
  "epss_score": 0.0028,
  "epss_percentile": 0.1946,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 8.718699066666666,
  "t0_at": "2026-10-02T07:54:16.063000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-02T09:09:24.987489+00:00",
      "days": 0.052186626030092595,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T07:54:16.063000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-02T07:54:16.063000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T07:54:16.063000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-18036"
    }
  }
}