Description

A security vulnerability has been detected in samanhappy MCPHub up to 1.0.32. The impacted element is the function importTemplate of the file src/services/templateService.ts of the component Template Import Endpoint. The manipulation leads to improper privilege management. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. Upgrading to version 1.0.33 is sufficient to resolve this issue. The identifier of the patch is 18a4467bc4ec6390b1f841d8a468a37e9922f837. It is advisable to upgrade the affected component.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.3",
  "pubDate": "2026-09-20T20:16:53.790Z",
  "pubdate": "2026-09-20T20:16:53.790Z",
  "executiveSummary": "A critical security vulnerability identified as improper privilege management exists in the Template Import Endpoint of samanhappy MCPHub, affecting versions up to 1.0.32.\nThe flaw resides within the importTemplate function in src/services/templateService.ts, allowing for unauthorized privilege escalation or management bypass.\nThis vulnerability is remotely exploitable, meaning a malicious actor does not require local access to the server to initiate an attack.\nDue to the public disclosure of a functional exploit, the risk of active exploitation is significant, necessitating immediate remediation.\nSuccessful exploitation allows an attacker to manipulate access control mechanisms, potentially gaining unauthorized administrative capabilities or overriding existing permission structures within the application's template import workflow.\nThe vulnerability poses a severe threat to the integrity and confidentiality of the affected systems by permitting unauthorized users to perform actions restricted to higher-privilege entities.",
  "technicalDetails": "The vulnerability stems from an insecure implementation of access control checks within the importTemplate function located in src/services/templateService.ts.\nIn the affected component, the application fails to properly validate the authorization context or the requestor's privileges before processing the template import operation.\nThe root cause is an improper privilege management flaw where the function relies on insufficient or missing security predicates during the template validation and ingestion phase.\nThe attack flow begins with a remote attacker interacting with the Template Import Endpoint. By submitting a crafted template request, the attacker can leverage the lack of server-side privilege validation to execute functions typically reserved for authorized users.\nBecause the vulnerability exists in the import logic itself, the application executes the template import without verifying if the user has the necessary permissions to modify, inject, or manage templates within the environment.\nAn attacker can exploit this by sending a specially crafted payload to the importTemplate function. Given that the component is exposed to remote input, an attacker can trigger the logic without prior authentication or by using low-privilege credentials, depending on the specific implementation of the endpoint's entry point.\nThe impact of this manipulation allows for potential arbitrary template injection or the bypassing of restricted workflows. Once the malicious payload is accepted by the importTemplate function, the system processes it under an elevated context, effectively resulting in an unauthorized privilege escalation.\nPost-exploitation, an attacker may be able to alter system configurations, access restricted data models, or maintain persistence within the MCPHub infrastructure by leveraging the compromised template management functionality.\nThe vulnerability is resolved by the patch 18a4467bc4ec6390b1f841d8a468a37e9922f837, which implements rigorous access control checks within src/services/templateService.ts, ensuring that only authenticated users with valid administrative privileges can interact with the importTemplate function."
}