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Critical

Security advisory

Type: advisorySources: OSVCVE: CVE-2026-10134

IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read and modify every flow, conversation, message, file upload, and saved component in the Langflow database, can connect to internal services, abuse cloud metadata endpoints, laterally move to other tenants on the same Langflow instance, and Establish persistence by modifying the public flow's `tool_code` so normal `/api/v1/build/...` calls by any user re-execute attacker code at each build.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-10134
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 17:12 UTC · Revision 1

Source evidence

CVE-2026-10134

core-osv · Original source

Published 30 Jun 2026, 20:17 UTC

IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read and modify every flow, conversation, message, file upload, and saved component in the Langflow database, can connect to internal services, abuse cloud metadata endpoints, laterally move to other tenants on the same Langflow instance, and Establish persistence by modifying the public flow's `tool_code` so normal `/api/v1/build/...` calls by any user re-execute attacker code at each build.

osv:CVE-2026-10134
Complete source record
{
  "id": "a6b6fbe4f33d1f27b8e4fdb57b8adf2bb21a206b36f253a422104a915b57a86d",
  "url": "https://osv.dev/vulnerability/CVE-2026-10134",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-10134",
    "summary": "IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read and modify every flow, conversation, message, file upload, and saved component in the Langflow database, can connect to internal services, abuse cloud metadata endpoints, laterally move to other tenants on the same Langflow instance, and Establish persistence by modifying the public flow's `tool_code` so normal `/api/v1/build/...` calls by any user re-execute attacker code at each build.",
    "evidence": "osv:CVE-2026-10134",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-10134",
      "aliases": [
        "CVE-2026-10134"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/langflow-ai/langflow",
              "type": "GIT",
              "events": [
                {
                  "introduced": "24d9e86885b877ea3e9d03cbc50b963765489721"
                },
                {
                  "last_affected": "b695f97cd393f0be3c498d472cbe6f53af372da4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.0.0"
                      },
                      {
                        "last_affected": "1.9.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10134.json"
          }
        }
      ],
      "modified": "2026-10-27T02:30:44.320246661Z",
      "provider": "osv",
      "references": [
        "https://www.ibm.com/support/pages/node/7277559"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-10134",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 460049,
  "published_at": "2026-06-30T20:17:26.883+00:00"
}