CVE-2026-10700: IBM Langflow OSS broken access control in file handling API

Summary

IBM Langflow OSS versions 1.0.0 through 1.8.4 contain multiple broken access control flaws in their file handling API. The /api/v1/files/images/{flow_id}/{file_name} endpoint enforces no authentication or authorization, so unauthenticated remote attackers can retrieve image files from any flow given a valid flow_id and file_name. The /api/v1/files/download/{flow_id}/{file_name} endpoint requires authentication but does not verify ownership, letting an authenticated user reach other users' files through arbitrary identifiers (IDOR). Exploitation can expose sensitive data in private flows and breaks tenant isolation in multi-user deployments.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

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