CVE-2026-26055

Unauthenticated Admission Webhook Endpoints in Yoke ATC

State: Published
Severity: 7.5 High
Published: Feb 12, 2026
Updated: Feb 12, 2026
Reserved: Feb 10, 2026

Description

Yoke is a Helm-inspired infrastructure-as-code (IaC) package deployer. In 0.19.0 and earlier, a vulnerability exists in the Air Traffic Controller (ATC) component of Yoke. The ATC webhook endpoints lack proper authentication mechanisms, allowing any pod within the cluster network to directly send AdmissionReview requests to the webhook, bypassing Kubernetes API Server authentication. This enables attackers to trigger WASM module execution in the ATC controller context without proper authorization.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	GitHub_M

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
yokeyokecd	<= 0.19.0Affected

References

https://github.com/yokecd/yoke/security/advisories/GHSA-965m-v4cc-6334

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