Arbitrary Code Injection Affecting github.com/yokecd/yoke/internal/atc package, versions <0.19.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMYOKECDYOKEINTERNALATC-15282849
- published15 Feb 2026
- disclosed12 Feb 2026
- creditb0b0haha, lixingquzhi
Introduced: 12 Feb 2026
CVE-2026-26056 (opens in a new tab)How to fix?
Upgrade github.com/yokecd/yoke/internal/atc to version 0.19.2 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via the overrides.yoke.cd/flight annotation, which allows a user-supplied URL to be used directly by the controller without validation. An attacker can execute arbitrary code within the controller context by injecting a malicious URL, leading to the creation or modification of Kubernetes resources and potential privilege escalation.
Note:
This is only exploitable if the attacker has create or update permissions on Custom Resources managed by the controller and the controller is able to access external URLs.
Workaround
This vulnerability can be mitigated by disabling the annotation override feature, restricting the controller's outbound network access, limiting create/update permissions to trusted users, or deploying a validating webhook to reject resources with the overrides.yoke.cd/flight annotation.