CVE-2026-54601 FastGPT: reTrainingCollection allows server-owned datasetId override causing cross-tenant authorization confusion
Authenticated users can override dataset IDs to access and modify other tenants' data due to inconsistent ownership checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54601?
CVE-2026-54601 is a medium-severity missing authorization vulnerability in labring FastGPT, published on 7 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-915
Which versions are affected by CVE-2026-54601?
How do I fix CVE-2026-54601?
No fix has been published for CVE-2026-54601 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-54601 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54601 exists.
Sources
Also known as GHSA-qxcq-48gr-93pj.