CVE-2026-105811

{
  "etk_id": "ETK-2026-851",
  "cve_id": "CVE-2026-105811",
  "display_id": "CVE-2026-105811",
  "ghsa_id": "GHSA-r223-2773-wq4w",
  "euvd_id": "EUVD-2026-93985",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authorization bypass in QnABot Amazon Q Business Lambda hook",
  "summary": "The optional Amazon Q Business Lambda hook sample for QnABot on AWS 7.0.0 through 7.4.5 has an authorization bypass involving a user-controlled key. An authenticated remote user could access S3 objects in the deploying AWS account if this separately deployed sample hook is in use; deployments without the hook are not affected.",
  "mitigation": "Upgrade the QnABot on AWS stack to version 7.4.6 or later, then redeploy the Amazon Q Business Lambda hook sample stack. Do not rely on the QnABot stack upgrade alone, as it does not update the separately deployed hook.",
  "vendor": "aws",
  "product": "qnabot-on-aws",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 7.0.0, < 7.4.6"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "7.4.6"
      ],
      "package_name": "qnabot-on-aws",
      "purl": null
    }
  ],
  "cwes": [
    639
  ],
  "cvss_score": 7.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
  "epss_score": 0.0033,
  "epss_percentile": 0.2507,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 14.772943716666667,
  "t0_at": "2026-10-06T20:03:31.155000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-06T20:03:31.155000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-06T20:03:31.155000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-105811"
    }
  }
}