CVE-2026-14716: GoClaw Authentication Bypass Vulnerability

CVE-2026-14716 Overview

CVE-2026-14716 is an incorrect authorization vulnerability [CWE-285] in the MethodRouter.Handle function of internal/gateway/router.go within the WebSocket RPC Handler component of nextlevelbuilder GoClaw. The flaw affects all versions up to and including 3.13.0-beta.2. Remote attackers with low privileges can manipulate the authorization logic to perform actions beyond their permitted scope. The issue was disclosed publicly through the project's GitHub issue tracker, and exploitation details are available to potential attackers.

Critical Impact
Authenticated remote attackers can bypass authorization checks in the WebSocket RPC layer, potentially accessing methods and data they should not be permitted to invoke.

Affected Products

nextlevelbuilder GoClaw versions up to 3.13.0-beta.2
Component: WebSocket RPC Handler (internal/gateway/router.go)
Function: MethodRouter.Handle

Discovery Timeline

2026-07-05 - CVE-2026-14716 published to NVD
2026-07-07 - Last updated in NVD database

Technical Details for CVE-2026-14716

Vulnerability Analysis

The vulnerability resides in the MethodRouter.Handle function, which dispatches incoming WebSocket Remote Procedure Call (RPC) requests to their target handlers. The router fails to correctly enforce authorization on invoked methods, allowing a client with valid low-privilege credentials to trigger operations reserved for higher-privileged principals. Because the flaw exists in the gateway routing layer, downstream handlers inherit the assumption that authorization already succeeded.

The attack requires network access to the WebSocket endpoint and authenticated but low-privilege credentials. No user interaction is required. Impact is limited to partial compromise of confidentiality, integrity, and availability within the vulnerable component.

Root Cause

The root cause is improper authorization [CWE-285] in the RPC dispatch path. The MethodRouter.Handle implementation does not consistently validate that the calling principal possesses the required permissions for the requested method before invocation. Method-level authorization checks are either missing or inconsistently applied across the routing table.

Attack Vector

An attacker establishes a WebSocket connection to the GoClaw gateway and authenticates using low-privilege credentials. The attacker then issues RPC requests targeting methods outside their authorization scope. Because MethodRouter.Handle does not enforce per-method access control, the requests are dispatched and executed. Refer to the GitHub Issue Tracker and VulDB Vulnerability Details for further technical context.

Detection Methods for CVE-2026-14716

Indicators of Compromise

WebSocket RPC requests invoking administrative or privileged methods from accounts that historically use only low-privilege operations.
Successful RPC responses for method names that should return authorization errors for the calling principal.
Anomalous method-invocation patterns from a single authenticated session traversing multiple privilege boundaries.

Detection Strategies

Instrument the gateway to log every RPC invocation with the authenticated principal, method name, and authorization decision, then alert on mismatches.
Baseline normal RPC method usage per role and flag deviations where low-privilege accounts invoke methods outside their profile.
Review the internal/gateway/router.go code path and audit unit tests for missing authorization assertions on registered methods.

Monitoring Recommendations

Forward WebSocket gateway logs to a centralized analytics platform and correlate authentication identity with invoked method scopes.
Monitor GitHub advisories and the VulDB CVE Entry for updated fix versions and exploit reports.
Track outbound state changes triggered by RPC calls and reconcile them against expected role-based workflows.

How to Mitigate CVE-2026-14716

Immediate Actions Required

Inventory all deployments of nextlevelbuilder GoClaw and identify instances running 3.13.0-beta.2 or earlier.
Restrict network exposure of the WebSocket gateway to trusted clients using network segmentation or an authenticating reverse proxy.
Rotate credentials for low-privilege accounts that could be leveraged as a foothold for authorization bypass.

Patch Information

At the time of publication, no fixed release is listed in the NVD entry. Monitor the GoClaw GitHub Repository and the tracking issue at GitHub Issue #1188 for an official patched version. Upgrade to the first release beyond 3.13.0-beta.2 that explicitly references remediation of MethodRouter.Handle.

Workarounds

Add an authorization middleware in front of MethodRouter.Handle that validates the caller's role against an allowlist for each RPC method.
Disable or unregister sensitive RPC methods from the router until an official patch is applied.
Enforce least-privilege on all GoClaw service accounts and remove unused low-privilege credentials that could be abused for authenticated access.

bash

# Configuration example: restrict WebSocket gateway to internal clients only
# (example iptables rule — adapt to your environment)
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP