{
    "id": "CVE-2026-55255",
    "published": "2026-06-23 17:17:08",
    "last_modified": "2026-07-08 13:39:12",
    "cvss_score": "8.4",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L",
    "cwe": "CWE-639",
    "description": "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.",
    "epss_score": "0.00887",
    "epss_percentile": "0.57666",
    "kev": 1,
    "kev_due": "2026-07-10",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:18:00",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2026-07-10."
    },
    "products": [
        {
            "vendor": "langflow",
            "product": "langflow"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2026-55255",
        "date_added": "2026-07-07",
        "due_date": "2026-07-10",
        "vendor": "Langflow",
        "product": "Langflow",
        "name": "Langflow Authorization Bypass Through User-Controlled Key Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e",
        "https://github.com/langflow-ai/langflow/pull/12832",
        "https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2",
        "https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2",
        "https://webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-55255"
    ]
}