| Component | Langflow |
| Severity | high (CVSS 7.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Published (NVD) | 2026-04-20 |
| Last modified | 2026-06-17 |
| Affected versions | <= 1.1.0 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | see the vendor advisory |
| Weakness | CWE-284CWE-434 |
| CISA KEV | not listed |
NVD 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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep Langflow off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-6596
- https://gist.github.com/chenhouser2025/c2aabfdee41009cfe45d28a9924742a0
- https://vuldb.com/submit/791919
- https://vuldb.com/vuln/358231
- https://vuldb.com/vuln/358231/cti
Read more
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