CVE-2026-111767

{
  "etk_id": "ETK-2026-376",
  "cve_id": "CVE-2026-111767",
  "display_id": "CVE-2026-111767",
  "ghsa_id": "GHSA-22jm-h49p-29qw",
  "euvd_id": "EUVD-2026-105256",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Cross-session task authorization flaw in @modelcontextprotocol/sdk",
  "summary": "@modelcontextprotocol/sdk 1.24.0 through 1.31.0 can expose experimental task records across sessions. A client may list, read, or cancel another session's tasks when the server supplies a shared InMemoryTaskStore through taskStore.",
  "mitigation": "Upgrade @modelcontextprotocol/sdk to version 1.32.0 or later. Until then, remove taskStore or use a distinct InMemoryTaskStore for each session.",
  "vendor": "npm",
  "product": "npm:@modelcontextprotocol/sdk",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.24.0, < 1.32.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "1.32.0"
      ],
      "package_name": "@modelcontextprotocol/sdk",
      "purl": "pkg:npm/@modelcontextprotocol/sdk"
    }
  ],
  "cwes": [
    639
  ],
  "cvss_score": 8.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L",
  "epss_score": 0.0035,
  "epss_percentile": 0.2671,
  "epss_asof": "2026-10-21",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 12.829788133333333,
  "t0_at": "2026-10-20T18:28:45.650000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-02T20:54:41+00:00",
      "days": -17.898664930555555,
      "is_lower_bound": false,
      "measured_at": "2026-10-20T18:28:45.650000+00:00",
      "url": "https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-22jm-h49p-29qw"
    }
  }
}