CVE-2026-19040 in mcp-api
Summary
by MITRE • 08/06/2026
A flaw has been found in MissionSquad mcp-api up to 1.11.9. The affected element is an unknown function of the file src/services/dcrClients.ts. Executing a manipulation can lead to server-side request forgery. The attack may be performed from remote. Upgrading to version 1.11.10 is sufficient to fix this issue. This patch is called f068ab4ad6f0907ac7001b995588c2673f11a755. You should upgrade the affected component.
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Analysis
by VulDB Data Team • 08/06/2026
This vulnerability resides within the MissionSquad mcp-api application version 1.11.9 and earlier, specifically targeting an unknown function located in the src/services/dcrClients.ts file. The flaw constitutes a server-side request forgery vulnerability that allows remote attackers to manipulate the application's behavior by crafting malicious requests that can cause the server to make unintended requests to arbitrary destinations. This type of vulnerability falls under the CWE-918 category of Server-Side Request Forgery, which represents a significant security risk when attackers can coerce the server into making requests to internal systems or external services they should not be able to access.
The technical implementation of this vulnerability appears to involve improper validation or sanitization of user-supplied input that is subsequently used in HTTP request construction within the dcrClients.ts service. When an attacker sends crafted data to the vulnerable endpoint, the application processes this input without adequate restrictions, allowing the malicious payload to influence where the server attempts to make outgoing requests. This could potentially enable attackers to access internal network resources, bypass firewalls, or perform reconnaissance activities against backend systems that should remain isolated from external access.
The operational impact of this vulnerability is substantial as it provides remote attackers with the ability to leverage the application's server as an intermediary for making unauthorized requests. This opens possibilities for attackers to probe internal networks, access sensitive data through internal APIs, or even escalate their attack by exploiting other vulnerabilities in systems that are typically protected by network segmentation. The vulnerability's remote exploitability means that attackers do not require physical access or network proximity to the target system, making it particularly dangerous in environments where such applications are exposed to untrusted networks.
The recommended mitigation involves upgrading the affected component to version 1.11.10, which includes the patch identified by commit hash f068ab4ad6f0907ac7001b995588c2673f11a755. This upgrade addresses the root cause of the vulnerability by implementing proper input validation and sanitization mechanisms that prevent malicious user data from influencing the destination of outgoing requests. Organizations should also consider implementing additional security controls such as network segmentation, outbound traffic filtering, and monitoring for unusual request patterns to further reduce the attack surface and detect potential exploitation attempts. The fix aligns with ATT&CK technique T1071.004 for Application Layer Protocol: DNS, as it prevents unauthorized external communications that could be used for data exfiltration or command and control activities.