CVE-2026-82111 in getnote-mcp
Summary
by MITRE • 08/28/2026
A vulnerability was detected in iswalle getnote-mcp up to 1.5.0. The affected element is the function fs.readFileSync of the file src/index.ts of the component upload_image. Performing a manipulation of the argument image_path results in path traversal. The attack can be initiated remotely. The exploit is now public and may be used. Upgrading to version 1.5.1 is sufficient to fix this issue. The patch is named 7f9a215e03575c650d38c8f87fc6d8d363fed80d. Upgrading the affected component is advised.
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Analysis
by VulDB Data Team • 08/28/2026
The vulnerability identified in iswalle getnote-mcp versions up to 1.5.0 represents a critical security flaw rooted in improper input validation within the upload_image component. Specifically, the issue resides in the src/index.ts file where the Node.js fs.readFileSync function is utilized to process image files provided by users. The core technical failure involves path traversal due to insufficient sanitization of the image_path argument passed to this function. When a remote attacker manipulates this input parameter, they can inject directory traversal sequences such as dot-dot-slash characters into the file path string. This manipulation allows the application to resolve paths outside of its intended document root or upload directory, effectively bypassing access controls that are supposed to restrict file operations to specific directories.
From an operational perspective, this vulnerability enables remote attackers to read arbitrary files from the underlying operating system where the getnote-mcp service is deployed. Since fs.readFileSync reads the contents of a file into memory and returns them, successful exploitation can lead to the disclosure of sensitive information stored on the server. This includes configuration files containing database credentials, private keys, environment variables with API secrets, or other application-specific data that should not be accessible via public-facing endpoints. The impact is severe because it compromises the confidentiality integrity of the system by allowing unauthorized access to critical resources without requiring authentication if the endpoint itself is exposed, or escalating privileges if combined with other vulnerabilities.
The presence of a publicly available exploit significantly increases the risk profile for organizations running affected versions. Attackers do not need to develop custom tools and can leverage existing proof-of-concept code to automate attacks against vulnerable instances across the internet. This aligns with common attack patterns observed in modern cyber operations where automated scanners target known vulnerabilities using public repositories of exploits. The vulnerability maps directly to CWE-22, which defines Improper Limitation of a Pathname to a Restricted Directory, commonly referred to as path traversal or directory traversal. In terms of the MITRE ATT&CK framework, this behavior corresponds to techniques involving T1083 File and Directory Discovery, where adversaries explore the file system to locate sensitive data for exfiltration.
To mitigate this risk immediately, organizations must upgrade iswalle getnote-mcp to version 1.5.1 or later. The patch associated with commit hash 7f9a215e03575c650d38c8f87fc6d8d363fed80d addresses the root cause by implementing proper validation and sanitization of file paths before they are passed to system-level functions. In addition to upgrading, it is advisable to implement defense-in-depth strategies such as using chroot jails or containerized environments with restricted filesystem access limits for services handling user uploads. Furthermore, input validation should enforce allowlists for permitted characters in filenames rather than relying solely on blacklist approaches which can be bypassed by encoding variations or novel traversal techniques. Regular security audits and static code analysis tools configured to detect unsafe file operations are recommended to prevent similar issues in future development cycles.