{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2025-34291",
  "revision": 1,
  "title": "Langflow — permissive cross-origin policy to account takeover",
  "summary": "Langflow up to 1.6.9 accepts credentialed requests from any origin (CORS) and ships its refresh cookie without a same-site restriction, so a page the victim visits can lift their session tokens and drive the built-in code execution.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 8.8,
    "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "version": "3.1"
  },
  "epss": 0.83629,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": true,
    "attack_complexity": "low",
    "kev_added": "2026-05-21",
    "prerequisites": "A signed-in Langflow user must visit an attacker-controlled page while their session is still live."
  },
  "kill_chain": "credential_access",
  "recommended_action": "Upgrade Langflow past 1.6.9 now and narrow the allowed origins; invalidate every existing session and review run history for code executed with a stolen token.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2025-34291",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2025-34291",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2025-34291",
      "retrieved_at": "2026-09-24T06:28:59.498Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34291",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "exploit",
      "url": "https://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform"
    },
    {
      "type": "writeup",
      "url": "https://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce"
    },
    {
      "type": "writeup",
      "url": "https://www.crowdsec.net/vulntracking-report/cve-2025-34291"
    }
  ],
  "published_at": "2025-12-05T23:15:47.433Z",
  "issued_at": "2026-09-24T06:28:59.498Z",
  "tags": [
    "langflow",
    "cors",
    "session-hijacking",
    "ai-tooling",
    "remote-code-execution",
    "kev"
  ]
}