CVE-2026-33484: langflow has Unauthenticated IDOR on Image Downloads

March 20, 2026

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.

References

github.com/advisories/GHSA-7grx-3xcx-2xv5
github.com/langflow-ai/langflow
github.com/langflow-ai/langflow/security/advisories/GHSA-7grx-3xcx-2xv5
nvd.nist.gov/vuln/detail/CVE-2026-33484

Code Behaviors & Features

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