{
 "id": "AIR-2026-0909",
 "slug": "cve-2026-87015-open-webui-session-cookie-leak-to-tool-server",
 "title": "CVE-2026-87015: Open WebUI Session Cookie Leak to Tool Servers",
 "summary": "Open WebUI improperly handles session cookies when multiple external tool servers are called in a single request, leaking authentication cookies to unintended endpoints. The issue arises from late cookie jar evaluation across connections.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln",
  "data_leak"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "Open WebUI"
 ],
 "incident_date": "2026-09-10",
 "incident_date_precision": "day",
 "first_reported": "2026-09-09",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87015",
   "publisher": "NVD",
   "title": "CVE-2026-87015: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform.",
   "published_at": "2026-09-09"
  },
  {
   "url": "https://github.com/advisories/GHSA-p78m-89r6-pgf7",
   "publisher": "GitHub Advisory Database",
   "title": "CVE-2026-87015: Open WebUI: A user's session cookies are sent to tool servers configured for bearer authentication",
   "published_at": "2026-09-10"
  }
 ],
 "source_count": 2,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_ghsa",
 "tags": [
  "CVE-2026-87015",
  "open-webui",
  "cookie-leak"
 ],
 "created_at": "2026-10-18T07:00:14.101Z",
 "updated_at": "2026-10-18T10:04:21.885Z"
}