Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook

Summary The Fission Function admission webhook pkg/webhook/function.go validated that spec.secrets.namespace and spec.configmaps.namespace equalled the function's own namespace but performed no equivalent check on spec.environment.namespace. Details An attacker with permission to create Functions...

EUVD-2026-36096

Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook...

GHSA-3R8V-2XMJ-5C39 Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook

Summary A Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by the admission webhook; PackageRef.Namespace was not. Details A tenant with functions.fission.io/create in their own namespace could set...

Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook

Summary A Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by the admission webhook; PackageRef.Namespace was not. Details A tenant with functions.fission.io/create in their own namespace could set...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' via improper validation of the namespace field in the Package custom resource definition. An attacker can execute arbitrary commands during the build process and exfiltrate service...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' via improper validation of the namespace field in the Package custom resource definition. An attacker can execute arbitrary commands during the build process and exfiltrate service...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' via improper validation of the namespace field in the Package custom resource definition. An attacker can execute arbitrary commands during the build process and exfiltrate service...

Access Control Bypass

Overview Affected versions of this package are vulnerable to Access Control Bypass in the Function admission webhook due to lack of namespace validation for the PackageRef.Namespace field. An attacker can access package data from other namespaces by submitting a crafted function specification...

Access Control Bypass

Overview Affected versions of this package are vulnerable to Access Control Bypass in the Function admission webhook due to lack of namespace validation for the PackageRef.Namespace field. An attacker can access package data from other namespaces by submitting a crafted function specification...

Access Control Bypass

Overview Affected versions of this package are vulnerable to Access Control Bypass in the Function admission webhook due to lack of namespace validation for the PackageRef.Namespace field. An attacker can access package data from other namespaces by submitting a crafted function specification...

Access Control Bypass

Overview Affected versions of this package are vulnerable to Access Control Bypass in the Function admission webhook due to lack of validation on the spec.environment.namespace field. An attacker can gain unauthorized access to environments in other namespaces by referencing them in a function...

CVE-2026-49823

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, a Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by...

CVE-2026-49824 Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, the Fission Function admission webhook pkg/webhook/function.go validated that spec.secrets.namespace and spec.configmaps.namespace...

CVE-2026-49823

Summary : CVE-2026-49823 affects Fission (Kubernetes-native serverless framework). Before version 1.24.0, the PackageRef.Namespace in a Fission Function spec was not validated by the admission webhook (unlike Secret/ConfigMap). This allowed cross-namespace access via an unvalidated Package refere...

CVE-2026-49823 Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, a Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by...

Fission 访问控制错误漏洞

Fission is an open-source function deployment framework based on Kubernetes. Versions of Fission prior to 1.24.0 contained a access control vulnerability. This vulnerability stemmed from the lack of namespace validation using the access webhook in the Fission Function specification for...

PT-2026-48505

Name of the Vulnerable Software and Affected Versions Fission versions prior to 1.24.0 Description An issue exists in the Fission serverless framework where the admission webhook fails to validate the namespace for the PackageRef.Namespace reference type. While Secret and ConfigMap reference type...

PT-2026-48506

Name of the Vulnerable Software and Affected Versions Fission versions prior to 1.24.0 Description Fission is an open-source, Kubernetes-native serverless framework used for deploying functions and applications on Kubernetes. The Function admission webhook in pkg/webhook/function.go fails to...

CVE-2026-6342

Mattermost plugins vulnerable to a namespace prefix-matching bypass. Affected: Mattermost Plugins versions

CVE-2026-6342

Mattermost Plugins versions =11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid namespaces which allows plugin users to create subscriptions to groups that were not whitelisted via creating groups that share the same prefix as a whitelisted group. Mattermost Advisory ID:...