Vulnerability · Published Feb 12, 2026 · Assigned by GitHub_M

CVE-2026-26055Unauthenticated Admission Webhook Endpoints in Yoke ATC

High 7.5

In plain English

A high-severity missing authentication in yoke from yokecd. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 59.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/yokecd/yoke	no fix listed	GHSA-965m-v4cc-6334
Go	github.com/yokecd/yoke	no fix listed	GO-2026-4491

Affected products (as reported)

Vendor	Product	Versions
yokecd	yoke	<= 0.19.0

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

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