CVE-2026-54601CWE-915

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

Medium · published July 7, 2026

CVSS v3.1
6.3
EPSS
0%
Percentile
33.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00405 · 33.6th percentile
Weakness
CWE-915 · Improperly Controlled Modification of Dynamically-Determined Object Attributes
Published
2026-07-07T21:16Z
EPSS history
Timeline
  • 07 JUL 21:16Z
    FastGPT: reTrainingCollection allows server-owned datasetId override causing cross-tenant authorization confusion
    cvelistv5