{
 "id": "CVE-2026-75128",
 "description": "Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).",
 "published": "2026-10-20",
 "last_modified": "2026-10-20",
 "vuln_status": "Awaiting Analysis",
 "cna": "disclosure@vulncheck.com",
 "cvss": {
  "version": "4.0",
  "score": 9.3,
  "severity": "CRITICAL",
  "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
  "source": "disclosure@vulncheck.com"
 },
 "cwe": [
  "CWE-306"
 ],
 "products": [
  {
   "vendor": "LangChain",
   "product": "LangChain",
   "versions_affected": null,
   "fixed_in": null,
   "product_id": "langchain"
  }
 ],
 "category": "framework",
 "surface": [
  "tool_execution",
  "auth_bypass"
 ],
 "kev": null,
 "fix": {
  "status": "unknown",
  "version": null,
  "url": null
 },
 "references": [
  {
   "url": "https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33",
   "source": "disclosure@vulncheck.com",
   "tags": []
  },
  {
   "url": "https://www.lasso.security/vulnerability-database/cve-2026-75128",
   "source": "disclosure@vulncheck.com",
   "tags": []
  },
  {
   "url": "https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint",
   "source": "disclosure@vulncheck.com",
   "tags": []
  }
 ],
 "related_agents": [
  "langchain-langchain",
  "langchain-langchain-deep-agents"
 ],
 "related_incidents": [],
 "match": {
  "tests": [
   "A:cpe",
   "B:vocabulary"
  ],
  "terms": [
   "langchain:langchain:langchain",
   "tool call"
  ]
 },
 "status": "candidate",
 "note": null,
 "reviewer": null,
 "checked_on": null,
 "retrieved_on": "2026-10-25"
}