TinyHumansAI OpenHuman up to 0.57.12 McpRemoteTool injection

Summaryinfo

A vulnerability marked as critical has been reported in TinyHumansAI OpenHuman up to 0.57.12. Affected by this vulnerability is an unknown functionality of the component McpRemoteTool. The manipulation leads to injection. This vulnerability is traded as CVE-2026-54140. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in TinyHumansAI OpenHuman up to 0.57.12 and classified as critical. This issue affects an unknown code of the component McpRemoteTool. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

OpenHuman is an open-source agent harness available as a desktop application and Rust library. Before 0.57.13, OpenHuman places names, descriptions, titles, and parameter definitions returned by configured external MCP servers into the agent model context without neutralizing instructions or bounding the descriptive fields. The McpRemoteTool records produced by list_tools preserve this remote content, while tool filtering considers the tool name and the prompt-injection detector screens user messages rather than MCP definitions. A malicious or compromised MCP server can therefore return a poisoned description that is evaluated on every agent turn and may direct the model to invoke other available tools, disclose accessible data, or perform unauthorized actions without a separate malicious user message. The issue affects users who configure an attacker-controlled or compromised MCP server. This issue is fixed in version 0.57.13.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-54140 since 06/11/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

Upgrading to version 0.57.13 eliminates this vulnerability.

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Productinfo

Vendor

• TinyHumansAI

Name

• OpenHuman

Version

• 0.57.0
• 0.57.1
• 0.57.2
• 0.57.3
• 0.57.4
• 0.57.5
• 0.57.6
• 0.57.7
• 0.57.8
• 0.57.9
• 0.57.10
• 0.57.11
• 0.57.12

Website

• Product: https://github.com/tinyhumansai/openhuman/

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