CVE-2026-54601
FastGPT: reTrainingCollection allows server-owned datasetId override causing cross-tenant authorization confusion
CVSS Score
6.3
EPSS Score
0.2%
EPSS Percentile
16th
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.
| CWE | CWE-915 |
| Vendor | labring |
| Product | fastgpt |
| Published | Jul 7, 2026 |
| Last Updated | Jul 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Affected Versions
labring / FastGPT
>= 4.14.17, < 4.15.0-beta4
References
github.com: https://github.com/labring/FastGPT/security/advisories/GHSA-qxcq-48gr-93pj github.com: https://github.com/labring/FastGPT/pull/7071 github.com: https://github.com/labring/FastGPT/commit/54a53e7d4399f1dfa2913394442c3cf6de672fb3 github.com: https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta4