{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.9.1"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "dc26d19c1ed5b2779a3a759f78a747f47089c534"
            },
            {
              "fixed": "2c9f498d664a3c32698b57d7c5e752625291060e"
            }
          ],
          "repo": "https://github.com/langflow-ai/langflow",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qrpv-q767-xqq2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55255.json"
  },
  "details": "Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.1.",
  "id": "CVE-2026-55255",
  "modified": "2026-07-15T01:49:12.934019759Z",
  "published": "2026-06-23T16:28:20.985Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-55255"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55255.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55255"
    },
    {
      "type": "ADVISORY",
      "url": "https://webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langflow-ai/langflow/pull/12832"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow"
}