CVE-2026-26055 Unauthenticated Admission Webhook Endpoints in Yoke ATC
Unauthenticated webhook endpoints in Yoke ATC allow cluster pods to trigger WASM execution, enabling unauthorized code execution and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-26055?
CVE-2026-26055 is a high-severity missing authorization vulnerability in yokecd yoke, published on 12 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-26055?
3 open source packages ship an affected version, including github.com/yokecd/yoke. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/yokecd/yoke Go | All versions | None |
github.com/yokecd/yoke Go | All versions to 0.19.0 | None |
github.com/yokecd/yoke Go | All versions to 0.19.0 | None |
Products include Yokecd Yoke.
How do I fix CVE-2026-26055?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-26055 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26055 exists.
Other vulnerabilities in yokecd yoke
Sources
Also known as GHSA-965m-v4cc-6334, GO-2026-4491.