Unintended Proxy or Intermediary ('Confused Deputy') Affecting github.com/radius-project/radius/pkg/controller/reconciler package, versions <0.58.0-rc2
Threat Intelligence
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-GITHUBCOMRADIUSPROJECTRADIUSPKGCONTROLLERRECONCILER-17734731
- published30 Jun 2026
- disclosed12 Jun 2026
- creditUnknown
Introduced: 12 Jun 2026
CVE-2026-53999 Â (opens in a new tab)How to fix?
Upgrade github.com/radius-project/radius/pkg/controller/reconciler to version 0.58.0-rc2 or higher.
Overview
Affected versions of this package are vulnerable to Unintended Proxy or Intermediary ('Confused Deputy') in the deserialization process of user-controlled data from the radapp.io/status annotation on a Kubernetes Deployment. An attacker can cause deletion of container resources belonging to other tenants by injecting a crafted annotation value that references a victim's resource ID. This is only exploitable if the attacker has permission to modify Deployment annotations and can obtain the target resource's ID in a multi-tenant environment.
Workaround
This vulnerability can be mitigated by restricting permissions to modify Deployment annotations using Kubernetes RBAC, monitoring modifications to radapp.io/status annotations for suspicious activity, and implementing strict network policies in multi-tenant environments.