CVE-2026-15542 in Isaiah
Summary
by MITRE • 07/13/2026
A vulnerability has been found in will-moss Isaiah up to 1.36.9. This affects an unknown function of the file app/main.go of the component Websocket Connection Authentication. The manipulation leads to improper authentication. The attack can be initiated remotely. The pull request to fix this issue awaits acceptance.
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Analysis
by VulDB Data Team • 07/19/2026
This vulnerability resides within the will-moss Isaiah application version 1.36.9 and specifically targets the websocket connection authentication mechanism implemented in the app/main.go file. The flaw represents a critical security weakness that allows unauthorized access to authenticated websocket connections through improper authentication controls. The vulnerability stems from inadequate validation of authentication tokens or credentials during the websocket handshake process, potentially enabling attackers to establish unauthorized connections without proper authorization. Given that the attack vector is remote, threat actors can exploit this weakness from external networks without requiring physical access to the system infrastructure.
The technical implementation flaw manifests in the websocket connection authentication component where the application fails to properly verify client credentials or tokens before establishing a persistent connection. This type of vulnerability commonly falls under CWE-287 which addresses improper authentication issues in software applications. The authentication bypass occurs during the initial websocket connection establishment phase, where the system should validate user identity and authorization status but instead permits connections based on insufficient or malformed authentication data. The weakness creates a persistent security gap that can be exploited by malicious actors to gain unauthorized access to real-time communication channels within the application.
Operationally this vulnerability presents significant risks to the confidentiality and integrity of data transmitted through websocket connections. Attackers could potentially intercept sensitive communications, manipulate real-time data exchanges, or establish persistent unauthorized access points within the application environment. The impact extends beyond simple unauthorized access as websocket connections often carry critical operational data including user session information, system alerts, and real-time updates that could be exploited for further compromise. This weakness also creates potential opportunities for lateral movement within network environments where websocket connections are used for inter-system communication.
The mitigation strategy should prioritize immediate implementation of proper authentication validation mechanisms within the websocket connection handler. Security controls must include robust token validation procedures, secure credential handling, and proper session management during websocket handshake processes. Organizations should implement multi-factor authentication requirements for websocket connections, enforce strong cryptographic protocols for authentication tokens, and establish monitoring systems to detect anomalous websocket connection patterns. Additionally, the fix should incorporate proper error handling that prevents information disclosure during authentication failures while maintaining system availability. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts usage, as it enables unauthorized access through compromised authentication mechanisms that could be used for broader network infiltration activities.