Cross-Tenant Data Access Vulnerability in FastGPT by Labring
CVE-2026-54601

6.3MEDIUM

Key Information:

Vendor

Labring

Status
Fastgpt
Vendor
CVE Published:
7 July 2026

What is CVE-2026-54601?

FastGPT, an open-source AI knowledge base platform, has a vulnerability affecting versions 4.14.17 to just before 4.15.0-beta4. Authenticated tenant users can exploit the API endpoint POST /api/core/dataset/collection/create/reTrainingCollection, potentially allowing them to use a server-owned datasetId from another tenant. This oversight results in mixed dataset objects that compromise authorization decisions, enabling unauthorized read, update, and delete access across different tenants if mixed object IDs are known. This critical issue has been addressed in version 4.15.0-beta4.

Affected Version(s)

FastGPT >= 4.14.17, < 4.15.0-beta4

References

https://github.com/labring/FastGPT/security/advisories/GH...
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https://github.com/labring/FastGPT/pull/7071
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https://github.com/labring/FastGPT/commit/54a53e7d4399f1d...
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CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.