CVE-2026-33484 Langflow has Unauthenticated IDOR on Image Downloads
Unauthenticated attackers can download any user's uploaded images by guessing flow IDs, exposing sensitive data in multi-tenant deployments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33484?
CVE-2026-33484 is a high-severity missing authorization vulnerability in Langflow Langflow, published on 24 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-33484?
3 open source packages ship an affected version, including langflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
langflow PyPI | From 1.0.0 | 1.9.0 |
langflow PyPI | From 1.0.0 | 1.9.0 |
langflow PyPI | From 1.0.0 | 1.9.0 |
Products include Langflow Langflow.
How do I fix CVE-2026-33484?
Upgrade langflow to 1.9.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-33484 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33484 exists.
Other vulnerabilities in Langflow Langflow
Sources
Also known as GHSA-7grx-3xcx-2xv5, PYSEC-2026-80.