CVE-2026-54601 FastGPT: reTrainingCollection allows server-owned datasetId override causing cross-tenant authorization confusion

FastGPT is an open source AI knowledge base platform. From 4.14.17 to before 4.15.0-beta4, FastGPT allows an authenticated tenant user to call POST /api/core/dataset/collection/create/reTrainingCollection in a way that persists a server-owned datasetId value from another tenant. This creates mixe...