{
 "id": "AIR-2026-0663",
 "slug": "cve-2026-45402-open-webui-cross-user-file-access-vulnerabili",
 "title": "CVE-2026-45402: Open WebUI Cross-User File Access Vulnerability",
 "summary": "Multiple Open WebUI endpoints fail to verify file ownership when attaching files to knowledge bases. This allows authenticated users to exfiltrate or overwrite other users' private files.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "Open WebUI"
 ],
 "incident_date": "2026-05-14",
 "incident_date_precision": "day",
 "first_reported": "2026-05-14",
 "sources": [
  {
   "url": "https://github.com/advisories/GHSA-r472-mw7m-967f",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-45402: Open WebUI: Cross-User File Access via Unchecked file_id in Folder Knowledge and Knowledge-Base Attach Endpoints",
   "published_at": "2026-05-14"
  },
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45402",
   "publisher": "NVD",
   "title": "CVE-2026-45402: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.",
   "published_at": "2026-05-15"
  }
 ],
 "source_count": 2,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-45402",
  "idor",
  "open-webui",
  "rag"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T10:04:21.885Z"
}