ETK-2026-467Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-467",
  "cve_id": null,
  "display_id": "ETK-2026-467",
  "ghsa_id": "GHSA-32h6-97mm-8q3c",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Callback type validation flaw in Wasmtime async components",
  "summary": "Wasmtime with component-model-async enabled may accept components whose async callback signatures are invalid. An attacker able to submit a malformed component could corrupt the native stack, potentially causing a process crash or escaping the WebAssembly sandbox to affect host code.",
  "mitigation": "Upgrade wasmtime to 48.0.4, 49.0.2 or later.",
  "vendor": "rust",
  "product": "rust:wasmtime",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 39.0.0, < 48.0.4",
        ">= 49.0.0, < 49.0.2"
      ],
      "ecosystem": "rust",
      "fixed_versions": [
        "48.0.4",
        "49.0.2"
      ],
      "package_name": "wasmtime",
      "purl": "pkg:cargo/wasmtime"
    }
  ],
  "cwes": [
    20
  ],
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 51.81995375,
  "t0_at": null,
  "signals": {
    "trigger_signal": {
      "at": "2026-10-02T19:39:24+00:00",
      "days": -19.005830011759258,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T19:47:47.736475+00:00",
      "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c"
    }
  }
}