CVE-2026-103635

{
  "etk_id": "ETK-2026-2165",
  "cve_id": "CVE-2026-103635",
  "display_id": "CVE-2026-103635",
  "ghsa_id": "GHSA-hh2m-8j82-33gp",
  "euvd_id": "EUVD-2026-96308",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Out-of-bounds read in DataSketches C++ Theta deserialization",
  "summary": "Apache DataSketches C++ versions 3.1.0 through 5.2.x can read beyond supplied data while decoding compact Theta sketches. An attacker who can provide malformed or truncated sketches to an application may cause a denial of service or expose process memory contents; applications that do not deserialize untrusted Theta sketches are not affected.",
  "mitigation": "Upgrade apache/datasketches-cpp to version 5.3.0. Until upgraded, prevent untrusted sources from supplying Theta sketch data for deserialization.",
  "vendor": "Apache Software Foundation",
  "product": "Apache DataSketches",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.1.0, <= 5.2.0"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "apache/datasketches-cpp",
      "purl": null
    }
  ],
  "cwes": [
    125
  ],
  "cvss_score": 9.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
  "epss_score": 0.0061,
  "epss_percentile": 0.4801,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 14.9898307,
  "t0_at": "2026-10-10T10:23:48.598000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-10T10:23:48.598000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-10T10:23:48.598000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-103635"
    }
  }
}