{"id":"CVE-2026-33484","aliases":["EUVD-2026-14876","GHSA-7grx-3xcx-2xv5","PYSEC-2026-80"],"status":"published","title":"Langflow has Unauthenticated IDOR on Image Downloads","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/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. 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. Version 1.9.0 contains a patch.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0594,"percentile":0.93318,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-284","CWE-639","CWE-862"],"published":"2026-03-20T20:47:10Z","modified":"2026-10-28T02:30:31Z","fixes":[{"ecosystem":"PyPI","package":"langflow","fixed_in":["1.9.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"langflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.9.0"}]}]},{"source":"osv","ecosystem":"PyPI","package":"langflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.9.0"}]}],"versions":["1.0.0","1.0.1","1.0.10","1.0.11","1.0.12","1.0.13","1.0.14","1.0.15","1.0.16","1.0.17","1.0.18","1.0.19","1.0.19.post1","1.0.19.post2","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.1.4.post1","1.2.0","1.3.0","1.3.1","1.3.2","1.3.3","1.3.4","1.4.0","1.4.1","1.4.2","1.4.3","1.5.0","1.5.0.post1","1.5.0.post2","1.5.1","1.6.0","1.6.1","1.6.2","1.6.3","1.6.4","1.6.5","1.6.6","1.6.7","1.6.8","1.6.9","1.7.0","1.7.1","1.7.2","1.7.3","1.8.0","1.8.0rc0","1.8.0rc1","1.8.0rc2","1.8.0rc3","1.8.0rc4","1.8.0rc5","1.8.0rc6","1.8.1","1.8.2","1.8.3","1.8.3rc0","1.8.4"]},{"source":"osv","ecosystem":"PyPI","package":"langflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.9.0"}]}],"versions":["1.0.0","1.0.1","1.0.10","1.0.11","1.0.12","1.0.13","1.0.14","1.0.15","1.0.16","1.0.17","1.0.18","1.0.19","1.0.19.post1","1.0.19.post2","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.1.4.post1","1.2.0","1.3.0","1.3.1","1.3.2","1.3.3","1.3.4","1.4.0","1.4.1","1.4.2","1.4.3","1.5.0","1.5.0.post1","1.5.0.post2","1.5.1","1.6.0","1.6.1","1.6.2","1.6.3","1.6.4","1.6.5","1.6.6","1.6.7","1.6.8","1.6.9","1.7.0","1.7.1","1.7.2","1.7.3","1.8.0","1.8.0rc0","1.8.0rc1","1.8.0rc2","1.8.0rc3","1.8.0rc4","1.8.0rc5","1.8.0rc6","1.8.1","1.8.2","1.8.3","1.8.3rc0","1.8.4"]}],"products":[{"vendor":"langflow","product":"langflow"},{"vendor":"langflow-ai","product":"langflow"}],"references":[{"url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-7grx-3xcx-2xv5","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","web","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33484","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-80.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-7grx-3xcx-2xv5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33484.json","tags":["advisory"]},{"url":"https://github.com/langflow-ai/langflow","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-33484","title":"Langflow has Unauthenticated IDOR on Image Downloads","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/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. 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. Version 1.9.0 contains a patch.","status":"published","published":"2026-03-24T12:57:33.641Z","modified":"2026-03-24T13:37:14.286Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-284","CWE-639","CWE-862"],"updated_at":"2026-11-02T14:20:07.609948Z"}],"euvd":[{"id":"EUVD-2026-14876","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/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. 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. Version 1.9.0 contains a patch.","status":"published","published":"2026-03-24T12:57:33Z","modified":"2026-03-24T13:37:14Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T19:25:30.317985Z"}],"ghsa":[{"id":"GHSA-7grx-3xcx-2xv5","title":"langflow has Unauthenticated IDOR on Image Downloads","description":"### 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/\u003cflow_uuid\u003e/\u003cfilename.png\u003e\"\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.","status":"published","published":"2026-03-20T20:47:10Z","modified":"2026-06-06T00:56:14Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-284","CWE-639","CWE-862"],"updated_at":"2026-11-02T14:40:18.682012Z"}],"nvd":[{"id":"CVE-2026-33484","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/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. 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. Version 1.9.0 contains a patch.","status":"published","published":"2026-03-24T14:16:30.607Z","modified":"2026-06-17T10:37:34.697Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-284","CWE-639","CWE-862"],"updated_at":"2026-11-02T14:12:10.568062Z"}],"osv":[{"id":"CVE-2026-33484","title":"Langflow has Unauthenticated IDOR on Image Downloads","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/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. 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. Version 1.9.0 contains a patch.","status":"published","published":"2026-03-24T12:57:33.641Z","modified":"2026-10-28T02:30:31.785029425Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-284","CWE-639","CWE-862"],"updated_at":"2026-11-02T15:45:01.896044Z"},{"id":"GHSA-7grx-3xcx-2xv5","title":"langflow has Unauthenticated IDOR on Image Downloads","description":"### 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/\u003cflow_uuid\u003e/\u003cfilename.png\u003e\"\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.","status":"published","published":"2026-03-20T20:47:10Z","modified":"2026-06-06T01:00:08.179664691Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-284","CWE-639","CWE-862"],"updated_at":"2026-11-02T15:46:41.002603Z"},{"id":"PYSEC-2026-80","description":"Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/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. 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. Version 1.9.0 contains a patch.","status":"published","published":"2026-03-24T14:16:30.607Z","modified":"2026-05-20T09:19:04.571976Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:52:58.117212Z"}]}}