CVE-2026-54601

Received Received - Intake

Authentication Bypass in FastGPT via Dataset ID Manipulation

Publication date: 2026-07-07

Last updated on: 2026-07-07

Assigner: GitHub, Inc.

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-07

Last Modified

2026-07-07

Generated

2026-07-08

AI Q&A

2026-07-08

EPSS Evaluated

N/A

NVD

CVE-2026-54601

Affected Vendors & Products

Vendor	Product	Version / Range
fastgpt	fastgpt	From 4.14.17 (inc) to 4.15.0-beta4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-915	The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified.

Attack-Flow Graph

Executive Summary

This vulnerability exists in FastGPT, an open source AI knowledge base platform, in versions from 4.14.17 to before 4.15.0-beta4. It allows an authenticated tenant user to call a specific API endpoint (POST /api/core/dataset/collection/create/reTrainingCollection) in a way that causes a server-owned datasetId from another tenant to be persisted. This results in mixed dataset objects where ownership is inconsistent, leading to authorization decisions based on incorrect ownership information.

Because of this, users can gain cross-tenant access to read, update, and delete datasets, collections, and training data if they know the mixed object IDs. The issue was fixed in version 4.15.0-beta4.

Impact Analysis

This vulnerability can impact you by allowing unauthorized access across tenants within the FastGPT platform. Specifically, an authenticated user from one tenant can read, modify, or delete datasets, collections, and training data belonging to another tenant if they know the relevant object IDs.

Such unauthorized cross-tenant access can lead to data leakage, data corruption, and loss of data integrity, potentially compromising the confidentiality, integrity, and availability of your data.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade FastGPT to version 4.15.0-beta4 or later, where the issue is fixed.

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