CVE-2026-6596CWE-284CWE-434

langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted upload

Medium · published April 20, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
39.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
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
EPSS
0.00472 · 39.9th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-04-20T02:15Z
EPSS history
Timeline
  • 20 APR 02:15Z
    langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted upload
    cvelistv5