CVE-2026-123338

{
  "etk_id": "ETK-2026-4377",
  "cve_id": "CVE-2026-123338",
  "display_id": "CVE-2026-123338",
  "ghsa_id": "GHSA-f29r-h9w7-gp62",
  "euvd_id": "EUVD-2026-125274",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Out-of-bounds write in Apache DataSketches C++ REQ deserialization",
  "summary": "Apache DataSketches C++ versions 3.0.0 through 5.3.0 are affected when an application reads REQ sketches from an untrusted source. A specially malformed serialized sketch can cause heap memory corruption through insufficient validation of header data.",
  "mitigation": "Upgrade Apache DataSketches C++ to version 5.3.1. Until upgraded, avoid deserializing REQ sketches obtained from untrusted sources.",
  "vendor": "Apache Software Foundation",
  "product": "Apache DataSketches C++",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 3.0.0, <= 5.3.0"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "apache/datasketches-cpp",
      "purl": null
    }
  ],
  "cwes": [
    787
  ],
  "cvss_score": null,
  "cvss_src": null,
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 10.302885666666667,
  "t0_at": "2026-11-13T10:32:43.404000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-13T10:32:43.404000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T10:32:43.404000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-123338"
    }
  }
}