CVE-2026-19374 in api-mcp
Summary
by MITRE • 08/10/2026
A security vulnerability has been detected in adafap api-mcp up to 92b9a5d04acfec165c7d4ef852496593aa87be06. This affects the function customAxios of the file app/api/proxy/route.ts of the component Proxy API Endpoint. The manipulation of the argument url leads to server-side request forgery. The attack is possible to be carried out remotely. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 08/10/2026
This vulnerability represents a critical server-side request forgery flaw in the adafap api-mcp application, specifically within the customAxios function located in app/api/proxy/route.ts. The issue arises from insufficient input validation when processing the url argument, allowing malicious actors to manipulate the parameter and potentially redirect requests to unintended destinations. The vulnerability exists at the Proxy API Endpoint component level, where user-supplied URL parameters are directly incorporated into outbound HTTP requests without proper sanitization or validation mechanisms. This type of flaw falls under CWE-918, which specifically addresses server-side request forgery vulnerabilities that occur when applications fail to validate or sanitize user-provided URLs.
The remote exploitation capability of this vulnerability presents significant operational risks as attackers can leverage it to perform unauthorized network requests from the server hosting the vulnerable application. This could enable various malicious activities including internal network reconnaissance, data exfiltration, or even privilege escalation if the target system has elevated permissions. The rolling release strategy employed by this project complicates remediation efforts since version tracking becomes challenging and the exact vulnerable versions cannot be definitively identified. Attackers may exploit this vulnerability through techniques such as path traversal, redirecting requests to internal services, or bypassing access controls that should normally restrict outbound communications.
The security implications extend beyond simple request manipulation as this flaw can potentially enable attackers to access internal systems that are not directly exposed to the internet. This represents a serious concern for organizations relying on this application component, as it could provide unauthorized access to backend services, databases, or other sensitive infrastructure components. The lack of response from the project maintainers following early reporting through issue channels creates an additional risk factor, as there is no immediate indication that a fix is being developed or deployed. Organizations utilizing this software should implement immediate mitigations such as network-level restrictions on outbound requests, input validation at proxy layers, and monitoring for suspicious URL patterns in API logs.
According to ATT&CK framework, this vulnerability maps to T1071.004 Network Protocol Impersonation and T1566.001 Phishing, as it enables attackers to manipulate network communications and potentially redirect users to malicious endpoints. The vulnerability also aligns with the principle of least privilege violations and represents a critical weakness in input validation controls that should be implemented at multiple layers of the application architecture. Organizations should consider implementing additional security controls including web application firewalls, outbound traffic filtering rules, and comprehensive logging of API endpoint requests to detect potential exploitation attempts. The absence of specific version information due to rolling releases makes this vulnerability particularly challenging to assess and remediate properly, requiring organizations to implement defensive measures regardless of exact release versions.
This type of vulnerability demonstrates the importance of secure coding practices specifically around URL handling and input validation in web applications. The flaw represents a fundamental security oversight that could be prevented through proper implementation of parameter validation, URL sanitization, and access control mechanisms. Organizations should prioritize immediate assessment of their own environments to determine if they are running vulnerable versions of this software, while also considering alternative proxy implementations that properly validate all user-supplied inputs before processing them in outbound network requests. The vulnerability underscores the critical need for comprehensive security testing including dynamic analysis and penetration testing of API endpoints to identify similar weaknesses in application architecture and implementation patterns.