CVE-2026-33484

Langflow has Unauthenticated IDOR on Image Downloads

State: Published
Severity: 7.5 High
Published: Mar 24, 2026
Updated: Mar 24, 2026
Reserved: Mar 20, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-284 Improper Access Control
CWE-639 Authorization Bypass Through User-Controlled Key
CWE-862 Missing Authorization

Affected Products

Product	Versions
langflowlangflow-ai	>= 1.0.0, < 1.9.0Affected

References

https://github.com/langflow-ai/langflow/security/advisories/GHSA-7grx-3xcx-2xv5

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