CVE-2026-104873

{
  "etk_id": "ETK-2026-373",
  "cve_id": "CVE-2026-104873",
  "display_id": "CVE-2026-104873",
  "ghsa_id": "GHSA-fvww-7h3r-vfhp",
  "euvd_id": "EUVD-2026-91794",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authorization bypass in langgraph-sdk resource decorators",
  "summary": "Affected Python langgraph-sdk deployments can misapply action restrictions on resource-scoped authorization decorators. An authenticated user may bypass fallback authorization checks and access or modify another user's resource when the deployment uses actions= on the affected decorators and the selected handler does not enforce all required checks.",
  "mitigation": "Upgrade langgraph-sdk to version 0.4.4. Until upgraded, avoid using actions= on the affected resource-scoped decorators and ensure selected handlers enforce action, ownership, and permission checks for every request.",
  "vendor": "langchain-ai",
  "product": "langgraph",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.1.45, <= 0.4.3"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.4.4"
      ],
      "package_name": "langgraph-sdk",
      "purl": "pkg:pypi/langgraph-sdk"
    }
  ],
  "cwes": [
    863
  ],
  "cvss_score": 7.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
  "epss_score": 0.0025,
  "epss_percentile": 0.1573,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 14.692817566666667,
  "t0_at": "2026-10-02T20:06:07.090000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-06T00:16:31.853059+00:00",
      "days": 3.173897720590278,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T20:06:07.090000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-02T20:06:07.090000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T20:06:07.090000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-104873"
    }
  }
}