CVE-2026-6596
langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted upload
- State
- Published
- Severity
- 6.9 Medium
- Published
- Apr 20, 2026
- Updated
- Apr 20, 2026
- Reserved
- Apr 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
langflowlangflow-ai |
|
References
- VDB-358231 | langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted uploadvdb-entrytechnical-description
- VDB-358231 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #791919 | Langflow <= 1.1.0 Unrestricted Upload of File with Dangerous Typethird-party-advisory
- https://gist.github.com/chenhouser2025/c2aabfdee41009cfe45d28a9924742a0exploit
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