{
 "id": "AIR-2026-0224",
 "slug": "cve-2026-51884-path-traversal-in-langchain-chatchat-upload-e",
 "title": "CVE-2026-51884: Path traversal in Langchain Chatchat upload endpoint",
 "summary": "A path traversal vulnerability in Langchain Chatchat's temporary document upload endpoint enables arbitrary file write via crafted filenames. The vulnerability carries a critical CVSS score.",
 "type": "attack_on_ai",
 "categories": [
  "infra_vuln"
 ],
 "severity": 2,
 "targets": [
  "framework_or_tooling"
 ],
 "products": [
  "Langchain Chatchat"
 ],
 "incident_date": "2026-10-01",
 "incident_date_precision": "day",
 "first_reported": "2026-10-01",
 "sources": [
  {
   "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-51884",
   "publisher": "NVD",
   "title": "CVE-2026-51884: The /knowledge_base/upload_temp_docs temporary document upload endpoint in Langchain Chatchat 0.3.1 is vulnerable to path…",
   "published_at": "2026-10-01"
  }
 ],
 "source_count": 1,
 "confidence": 0.95,
 "status": "published",
 "origin": "seed_nvd",
 "tags": [
  "CVE-2026-51884",
  "path-traversal",
  "langchain-chatchat"
 ],
 "created_at": "2026-10-18T06:33:31.967Z",
 "updated_at": "2026-10-18T06:33:31.967Z"
}