{
 "id": "CVE-2026-107366",
 "description": "IBM Langflow OSS 1.0.0 through 1.12.4 contains three message endpoints that perform no ownership verification. Any authenticated user can bulk-delete another user's messages, overwrite message content to inject malicious prompts, or hijack an entire conversation session by reassigning its session ID.",
 "published": "2026-10-20",
 "last_modified": "2026-10-21",
 "vuln_status": "Awaiting Analysis",
 "cna": "psirt@us.ibm.com",
 "cvss": {
  "version": "3.1",
  "score": 8.3,
  "severity": "HIGH",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L",
  "source": "psirt@us.ibm.com"
 },
 "cwe": [
  "CWE-639"
 ],
 "products": [
  {
   "vendor": "Langflow",
   "product": "Langflow",
   "versions_affected": null,
   "fixed_in": null,
   "product_id": "langflow"
  }
 ],
 "category": "framework",
 "surface": [
  "auth_bypass"
 ],
 "kev": null,
 "fix": {
  "status": "unknown",
  "version": null,
  "url": null
 },
 "references": [
  {
   "url": "https://www.ibm.com/support/pages/node/7293016",
   "source": "psirt@us.ibm.com",
   "tags": []
  }
 ],
 "related_agents": [
  "langflow-langflow"
 ],
 "related_incidents": [],
 "match": {
  "tests": [
   "A:cpe"
  ],
  "terms": [
   "langflow:langflow:langflow"
  ]
 },
 "status": "candidate",
 "note": null,
 "reviewer": null,
 "checked_on": null,
 "retrieved_on": "2026-10-25"
}