CVE-2026-103501

{
  "etk_id": "ETK-2026-2168",
  "cve_id": "CVE-2026-103501",
  "display_id": "CVE-2026-103501",
  "ghsa_id": "GHSA-w656-xfm5-jqjh",
  "euvd_id": "EUVD-2026-96306",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Heap buffer overflow in Apache DataSketches C++ HLL deserialization",
  "summary": "Apache DataSketches C++ before 5.3.0 can overflow heap memory while deserializing HLL sketches. An attacker who can supply a crafted sketch to an application may cause a crash or potentially achieve further impact. Exposure requires the application to deserialize HLL sketch data from an untrusted source.",
  "mitigation": "Upgrade apache/datasketches-cpp to version 5.3.0 or later. Until upgraded, do not deserialize HLL sketches received from untrusted sources.",
  "vendor": "Apache Software Foundation",
  "product": "Apache DataSketches",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.0.0-incubating, <= 5.2.0"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "apache/datasketches-cpp",
      "purl": null
    }
  ],
  "cwes": [
    122
  ],
  "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": 0.0066,
  "epss_percentile": 0.5046,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 12.510715283333333,
  "t0_at": "2026-10-10T10:22:55.843000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-10T10:22:55.843000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-10T10:22:55.843000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-103501"
    }
  }
}