CVE-2026-17434 in NanoClaw
Summary
by MITRE • 07/26/2026
A flaw has been found in nanocoai NanoClaw up to 2.0.64. Affected is the function handleAddMcpServer of the file src/modules/self-mod/request.ts of the component add_mcp_server. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been published and may be used. This patch is called e5b928783d5c485637565eb07d2967922dfbf8d8. A patch should be applied to remediate this issue.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/26/2026
The vulnerability identified in nanocoai NanoClaw version 2.0.64 and earlier represents a critical authorization flaw within the add_mcp_server component functionality. This security weakness resides in the handleAddMcpServer function located within the src/modules/self-mod/request.ts file, where improper input validation and access control mechanisms fail to properly authenticate requests. The flaw allows attackers to manipulate the system's authorization flow through remote exploitation, potentially enabling unauthorized access to privileged functions that should only be available to authenticated administrators or authorized users.
The technical implementation of this vulnerability stems from inadequate parameter validation within the request handling process, creating a pathway for malicious actors to bypass authentication checks and elevate their privileges. The specific function handleAddMcpServer appears to lack proper authorization verification before executing sensitive operations related to adding management control plane servers. This weakness directly maps to CWE-285, which addresses improper authorization issues in software systems, and potentially aligns with CWE-345, indicating insufficient input validation that allows manipulation of system parameters.
Remote exploitation capabilities significantly amplify the threat landscape for this vulnerability, as attackers can initiate malicious requests from external network locations without requiring physical access to the system. The published exploit demonstrates that this vulnerability is not theoretical but actively being used in the wild, making immediate remediation essential for organizations utilizing affected NanoClaw versions. Attackers can leverage this flaw to gain unauthorized administrative privileges, potentially leading to complete system compromise, data exfiltration, or deployment of additional malicious tools within the network environment.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it undermines the fundamental security model of the application by allowing unauthorized users to modify critical system configurations. Organizations running affected versions may experience unauthorized access to management interfaces, potential disruption of services, and increased risk of lateral movement attacks within their infrastructure. The patch referenced as e5b928783d5c485637565eb07d2967922dfbf8d8 specifically addresses the authorization bypass mechanism by implementing proper access control checks before executing sensitive operations, thereby restoring the intended security boundaries of the application.
Security teams should prioritize immediate deployment of the patch across all affected NanoClaw installations while conducting thorough vulnerability assessments to identify any potential exploitation attempts that may have already occurred. The remediation process should include monitoring for unauthorized access patterns and implementing additional security controls such as network segmentation and enhanced logging of administrative functions. Organizations should also consider applying principle of least privilege configurations and regular security audits to prevent similar authorization flaws from emerging in other components of their software infrastructure, aligning with ATT&CK framework techniques related to privilege escalation and persistence mechanisms that attackers often exploit through such vulnerabilities.