{
    "id": "CVE-2025-34291",
    "published": "2025-12-05 23:15:47",
    "last_modified": "2026-07-14 23:17:22",
    "cvss_score": "8.8",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-346",
    "description": "Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.",
    "epss_score": "0.92808",
    "epss_percentile": "0.99828",
    "kev": 1,
    "kev_due": "2026-06-04",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:40:08",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2026-06-04."
    },
    "products": [
        {
            "vendor": "langflow",
            "product": "langflow"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2025-34291",
        "date_added": "2026-05-21",
        "due_date": "2026-06-04",
        "vendor": "Langflow",
        "product": "Langflow",
        "name": "Langflow Origin Validation Error Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://github.com/langflow-ai/langflow",
        "https://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform",
        "https://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34291",
        "https://www.crowdsec.net/vulntracking-report/cve-2025-34291"
    ]
}