Description

A flaw was found in multicloud-operators-subscription. A privileged user, specifically a namespace administrator capable of creating Channel and Subscription resources, can exploit this vulnerability. By manipulating the Channel.Spec.SecretRef.Namespace field, the user can cause the system to copy sensitive Secret contents from other namespaces into their own, leading to information disclosure.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.7",
  "pubDate": "2026-08-12T02:16:37.937Z",
  "pubdate": "2026-08-12T02:16:37.937Z",
  "executiveSummary": "A vulnerability has been identified in multicloud-operators-subscription that allows unauthorized access to sensitive information across namespaces.\nThe vulnerability type is an information disclosure flaw resulting from improper handling of cross-namespace references within resource specifications.\nThe impact of successful exploitation involves the unauthorized copying and exposure of sensitive Secret contents originating from arbitrary namespaces into a namespace controlled by the attacker.\nThe affected product is multicloud-operators-subscription, impacting environments utilizing the vulnerable subscription and channel management components.\nThe risk implications are significant, as compromised secrets may contain credentials, tokens, or encryption keys that grant broader access to the cluster or connected services.\nAttacker capabilities require authenticated access with specific privileges, specifically functioning as a namespace administrator capable of creating Channel and Subscription resources.\nExploitation requirements dictate that the attacker must have authorization to define Channel and Subscription custom resources within their designated namespace, leveraging these permissions to trigger the insecure secret-copying behavior.",
  "technicalDetails": "The root cause of the vulnerability lies in the improper validation and sanitization of cross-namespace references processed by the multicloud-operators-subscription controller.\nSpecifically, the vulnerable component fails to enforce namespace boundary checks when processing the Channel.Spec.SecretRef.Namespace field.\nAuthentication and privilege requirements mandate that the attacker possesses privileges as a namespace administrator, enabling them to instantiate Channel and Subscription resources.\nThe attack flow proceeds as follows: First, the privileged user crafts a malicious Channel resource or modifies an existing one within their authorized namespace.\nSecond, the user sets the Channel.Spec.SecretRef.Namespace field to point to a target namespace containing sensitive data, while referencing a specific Secret object within that external namespace.\nThird, the user creates a corresponding Subscription resource that utilizes the manipulated Channel.\nFourth, when the multicloud-operators-subscription controller reconciles the Subscription and Channel resources, it processes the cross-namespace secret reference.\nDue to the lack of adequate access controls and validation in the controller logic, the system reads the Secret object from the specified foreign namespace and copies its sensitive contents into a Secret object within the attacker-controlled namespace.\nThe payload behavior involves abusing the legitimate synchronization and secret resolution mechanisms of the operator to act as an oracle or data exfiltration vector.\nPost-exploitation impact includes the immediate exposure of confidential material such as API keys, database credentials, and service account tokens to the namespace administrator, enabling lateral movement and further compromise of connected systems."
}