{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.0.19"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "06013ae86a882e5ab3fe547c272adf5a3620c8a5"
            }
          ],
          "repo": "https://github.com/langflow-ai/langflow",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qwqc-p3q8-wcg9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55446.json"
  },
  "details": "Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.0.19, an attacker can send a /api/v1/files/upload/ request without any authentication token/cookies and abuse a very long multipart form boundary to make the langflow app unusable for all users for an indefinite amount of time. This vulnerability is fixed in 1.0.19.",
  "id": "CVE-2026-55446",
  "modified": "2026-07-15T01:49:04.703664543Z",
  "published": "2026-06-23T16:26:17.990Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55446.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-qwqc-p3q8-wcg9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55446"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langflow-ai/langflow/pull/3923"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Langflow: Unauthenticated DoS through multipart form boundary file upload"
}