Is this vulnerability remotely exploitable from outside the cluster?

Typically no. Exploitation generally requires network-level access to the ATC webhook service, which is usually only reachable from within the Kubernetes cluster. However, any pod able to reach that service can potentially exploit the issue.

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

The attacker needs the ability to run or compromise a pod that can communicate with the ATC webhook endpoints. They do not need direct access to the Kubernetes API Server, because the missing authentication allows them to bypass API Server controls.

What is the safest general fix pattern for this issue?

Enforce strong authentication and identity verification on the ATC webhook, typically via mTLS and strict certificate or token checks, and ensure only the Kubernetes API Server (or an explicitly trusted set of control-plane components) can invoke the AdmissionReview endpoints.

Severity:

HIGH RISK

(7.5)

Missing Authentication for Webhook Endpoints (CWE-306) in Yoke ATC Controller

CVE-2026-26055

Published:

Feb 12, 2026

Status:

Awaiting Analysis

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 / Broken Access Control

CWE:

CWE-306

Impact:

Unauthorized Code Execution within Cluster Control Plane Components

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication / Broken Access Control

CWE:

CWE-306

Impact:

Unauthorized Code Execution within Cluster Control Plane Components

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Missing Authentication for Webhook Endpoints (CWE-306) in Yoke ATC Controller

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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