labring FastGPT up to 4.15.0-beta3 Remote Reference Resolver ref information disclosure

Summaryinfo

A vulnerability marked as problematic has been reported in labring FastGPT up to 4.15.0-beta3. This vulnerability affects unknown code of the component Remote Reference Resolver. The manipulation of the argument ref leads to information disclosure. This vulnerability is traded as CVE-2026-54607. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in labring FastGPT up to 4.15.0-beta3 and classified as problematic. This issue affects an unknown code of the component Remote Reference Resolver. The manipulation of the argument ref with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

FastGPT is a knowledge-based AI application platform. Prior to 4.15.0-beta4, the HTTP-tool OpenAPI schema importer validates only the top-level URL before passing it to SwaggerParser.bundle, whose remote reference resolver fetches $ref URLs without FastGPT's internal-address guard and returns fetched content inline, allowing an authenticated team member to read internal services or cloud metadata. This issue is fixed in version 4.15.0-beta4.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-54607 since 06/15/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 4.15.0-beta4 eliminates this vulnerability.

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Productinfo

Vendor

• labring

Name

• FastGPT

Version

• 4.15.0-beta1
• 4.15.0-beta2
• 4.15.0-beta3

Website

• Product: https://github.com/labring/FastGPT/

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