{
 "id": "AIR-2026-0756",
 "slug": "cve-2026-54021-open-webui-proxy-bypass-routes-calls-to-arbit",
 "title": "CVE-2026-54021: Open WebUI proxy bypass routes calls to arbitrary Ollama backends",
 "summary": "Direct indexed Ollama proxy routes failed to validate backend authorization against requested indices, letting authenticated users access internal backends. The vulnerability exposes unauthorized higher-privilege or restricted Ollama instances.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "Open WebUI",
  "Ollama"
 ],
 "incident_date": "2026-06-17",
 "incident_date_precision": "day",
 "first_reported": "2026-06-17",
 "sources": [
  {
   "url": "https://github.com/advisories/GHSA-9rpj-v7hf-vv2w",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-54021: Open WebUI: Authenticated users can target arbitrary configured Ollama backends via unguarded url_idx path parameter",
   "published_at": "2026-06-17"
  },
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54021",
   "publisher": "NVD",
   "title": "CVE-2026-54021: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.",
   "published_at": "2026-06-23"
  }
 ],
 "source_count": 2,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-54021",
  "open-webui",
  "ollama",
  "access-control"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T10:04:21.885Z"
}