Description
A security flaw has been discovered in langflow-ai langflow up to 1.1.0. This issue affects the function create_upload_file of the file src/backend/base/Langflow/api/v1/endpoints.py of the component API Endpoint. The manipulation results in unrestricted upload. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| langflow-ai | langflow | 1.0, 1.1.0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | langflow-base | < 0.9.1 | 0.9.1 | GHSA-vvfc-fp59-m92g |
Advisories 1
- WID-SEC-2026-1178 Langflow: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 19, 2026
References
- VDB-358231 | langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted upload vdb-entry technical-description
- VDB-358231 | CTI Indicators (IOB, IOC, TTP, IOA) signature permissions-required
- Submit #791919 | Langflow <= 1.1.0 Unrestricted Upload of File with Dangerous Type third-party-advisory
- https://gist.github.com/chenhouser2025/c2aabfdee41009cfe45d28a9924742a0 exploit