Is this vulnerability remotely exploitable?

Yes. If the WebSocket endpoint is reachable over the internet or from untrusted networks, attackers can remotely connect without authentication and interact with the exposed functionality.

What level of access does an attacker need to exploit this?

Typically only network-level access to the WebSocket URL is required. No valid user account or prior authentication is needed if the endpoint fails to enforce identity checks.

What is the safest general fix pattern?

Apply the same authentication and authorization logic used for your standard HTTP APIs to all WebSocket endpoints. Require a valid session or token at connection time, bind the connection to that identity, and enforce per-operation authorization.

Severity:

CRITICAL RISK

(9.4)

Missing Authentication for WebSocket Endpoint (CWE-306) in Real-Time Application Interfaces

CVE-2025-54816

Published:

Jan 22, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-306

Impact:

Privilege Escalation and Unauthorized Access to Sensitive Data

Severity:

CRITICAL RISK

(9.4)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-306

Impact:

Privilege Escalation and Unauthorized Access to Sensitive Data

Severity:

CRITICAL RISK

(9.4)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Missing Authentication for WebSocket Endpoint (CWE-306) in Real-Time Application Interfaces

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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