{"id":"CVE-2026-33484","aliases":["GHSA-7grx-3xcx-2xv5","PYSEC-2026-80"],"url":"https://o3.security/vulnerability/CVE-2026-33484","summary":"Langflow has Unauthenticated IDOR on Image Downloads","details":"### Summary\nThe `/api/v1/files/images/{flow_id}/{file_name}` endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flow_id and file_name returns the image with HTTP 200.\n\n### Details\n`src/backend/base/langflow/api/v1/files.py:138-164` — `download_image` takes `flow_id`: UUID as a bare path parameter with no Depends(get_flow) or `CurrentActiveUser`. All other file routes (`download_file`, `upload_file`, `list_files`, `delete_file`) use `Depends(get_flow)` which enforces both authentication and ownership. There is no global auth middleware on /api/v1; protection is per-endpoint only.\n\n### PoC\n```\ncurl -v \"http://localhost:7860/api/v1/files/images/<flow_uuid>/<filename.png>\"\n# Returns HTTP 200 with image bytes, no auth header required\n```\n\n### Impact\nUnauthenticated cross-tenant data leak. In a multi-tenant deployment, any attacker who can discover or guess a `flow_id` (UUIDs can be leaked through other API responses) can download any user's uploaded images without credentials.","published":"2026-03-24T12:57:33.641Z","modified":"2026-10-28T02:30:31.785029425Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"langflow","fixedVersion":"1.9.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33484.json"},{"type":"ADVISORY","url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-7grx-3xcx-2xv5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33484"},{"type":"PACKAGE","url":"https://github.com/langflow-ai/langflow"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-80.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:31.785029425Z"}}