Langflow <= 1.6.9 CORS Misconfiguration to Token Hijack & RCE_CVE-2025-34291

{
    "lastseen": "",
    "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 \u2014 including built-in code-execution functionality \u2014 allowing the attacker to execute arbitrary code and achieve full system compromise.",
    "published": "2025-12-05T22:27:26.438Z",
    "modified": "2025-12-05T22:27:26.438Z",
    "type": "cve",
    "title": "Langflow <= 1.6.9 CORS Misconfiguration to Token Hijack & RCE",
    "source": "VulnCheck",
    "references": "https://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform\nhttps://github.com/langflow-ai/langflow\nhttps://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce",
    "id": "CVE-2025-34291",
    "bulletinFamily": "",
    "cwe": [
        "CWE-346"
    ],
    "cvelist": null,
    "sourceData": "Langflow Langflow 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.4,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Langflow",
    "version": "0",
    "vendor": "Langflow",
    "ai_description": "Langflow is vulnerable to a chained vulnerability that enables account takeover and remote code execution due to an overly permissive CORS configuration and a refresh token cookie configured as SameSite=None.",
    "ai_severity": "Critical",
    "ai_vendor": "Langflow",
    "ai_product": "Langflow",
    "ai_version": "1.6.9",
    "ai_score": 9.4
}