CVE-2026-74755

{
  "etk_id": "ETK-2026-2342",
  "cve_id": "CVE-2026-74755",
  "display_id": "CVE-2026-74755",
  "ghsa_id": "GHSA-9644-97m2-4fc3",
  "euvd_id": "EUVD-2026-107180",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Integer underflow in Apache bRPC mcpack2pb",
  "summary": "Apache bRPC releases before 1.18.0 can terminate unexpectedly while processing malformed mcpack2 data. A remote unauthenticated attacker can cause a denial of service when the server accepts nshead frames through the ubrpc mcpack2 adaptor. Standard open-source server configurations do not enable the affected protocol path by default.",
  "mitigation": "Upgrade Apache bRPC to version 1.18.0 or later. Until upgraded, disable or restrict server exposure of the nshead and ubrpc mcpack2 adaptor path.",
  "vendor": "Apache Software Foundation",
  "product": "Apache bRPC",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 1.18.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.18.0"
      ],
      "package_name": "apache/brpc",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": null,
  "cvss_src": null,
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 65.89313716666666,
  "t0_at": "2026-10-21T11:45:25.658000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-21T11:45:25.658000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-21T11:45:25.658000+00:00",
      "url": "https://github.com/advisories/GHSA-9644-97m2-4fc3"
    }
  }
}