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OpenAdvisories
Medium · 6.3 CVE-2026-54601 EUVD-2026-42114

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

Published Jul 7, 2026 · Updated Jul 8, 2026 · Assigned by GitHub_M

Description

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 mixed dataset objects and downstream dataset, collection, and training endpoints then make authorization decisions from inconsistent ownership anchors, allowing cross-tenant read, update, and delete access when mixed object ids are known. This issue is fixed in version 4.15.0-beta4.

Affected products

VendorProductAffectedFixed
labring FastGPT >= 4.14.17, < 4.15.0-beta4 —

References