CVE-2026-19337 in mcp-google-search
Summary
by MITRE • 08/09/2026
A vulnerability was determined in adenot mcp-google-search up to 0.3.1. Impacted is an unknown function of the file src/index.ts of the component read_webpage. Executing a manipulation of the argument url can lead to server-side request forgery. The attack is restricted to local execution. This patch is called f071d491b685011ca04e8ab8d586fc65f86bcee1. It is advisable to implement a patch to correct this issue.
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Analysis
by VulDB Data Team • 08/10/2026
The vulnerability identified in adenot mcp-google-search version 0.3.1 represents a critical server-side request forgery flaw that emerges from improper input validation within the read_webpage component. This security weakness resides in the src/index.ts file where an unknown function processes URL arguments without adequate sanitization measures. The vulnerability allows attackers to manipulate the url parameter in ways that could potentially enable unauthorized access to internal systems or services that the affected application can reach.
The technical nature of this flaw aligns with common server-side request forgery patterns documented in CWE-918, which specifically addresses server-side request forgery vulnerabilities where applications fail to properly validate and sanitize external input before using it in HTTP requests. The attack vector is particularly concerning because it enables unauthorized requests to be made from the server hosting the vulnerable component, potentially allowing adversaries to access internal network resources or perform unauthorized operations on behalf of the application.
The operational impact of this vulnerability extends beyond simple data exfiltration as it creates a potential pathway for attackers to escalate privileges and gain deeper access to systems. While the initial attack is restricted to local execution, the implications are significant because the vulnerable component could be leveraged to probe internal networks or access services that are not directly exposed to external threats. This type of vulnerability can serve as a stepping stone for more extensive attacks within network environments where the affected application operates.
Security practitioners should implement the recommended patch identified by the commit hash f071d491b685011ca04e8ab8d586fc65f86bcee1 to address this vulnerability. The mitigation strategy must include thorough input validation and sanitization of all URL parameters before they are processed by the read_webpage function. Additionally, implementing proper access controls and network segmentation can help limit the potential impact should the vulnerability be exploited. Organizations should also consider monitoring for unusual outbound requests that might indicate exploitation attempts. This vulnerability demonstrates the importance of validating external inputs in web applications and highlights how seemingly simple functions can create significant security risks when proper sanitization measures are not implemented. The ATT&CK framework categorizes this type of vulnerability under T1190 - Exploit Public-Facing Application, emphasizing the need for regular security assessments of all application components that interact with external resources.