GHSA-7GRX-3XCX-2XV5 langflow has Unauthenticated IDOR on Image Downloads

Summary The /api/v1/files/images/flowid/filename endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flowid and filename returns the image with HTTP 200. Details src/backend/base/langflow/api/v1/files.py:138-164 — downloadimage takes...