CVE-2026-33484CWE-284CWE-639CWE-862

Langflow has Unauthenticated IDOR on Image Downloads

High · published March 24, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
47.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00580 · 47.0th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-639 · Authorization Bypass Through User-Controlled Key; CWE-862 · Missing Authorization
Published
2026-03-24T12:57Z
EPSS history
Timeline
  • 24 MAR 12:57Z
    Langflow has Unauthenticated IDOR on Image Downloads
    cvelistv5