SteeltoeOSS Steeltoe.Management.Endpoint up to 4.1.x AddAllActuators privileges management

Summaryinfo

A vulnerability described as critical has been identified in SteeltoeOSS Steeltoe.Management.Endpoint and Steeltoe.Management.EndpointBase up to 4.1.x. This affects the function AddAllActuators. Executing a manipulation can lead to privileges management. This vulnerability is registered as CVE-2026-50201. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in SteeltoeOSS Steeltoe.Management.Endpoint and Steeltoe.Management.EndpointBase up to 4.1.x. This vulnerability affects the function AddAllActuators. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality. CVE summarizes:

Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. In Steeltoe.Management.Endpoint prior to version 4.2.0 and Steeltoe.Management.EndpointCore prior to version 3.4.0, all Steeltoe actuator endpoints default to `EndpointPermissions.Restricted`, which is mappeds to Cloud Foundry's `read_basic_data` permission (granted to Space Auditors and similar low-trust roles). Sensitive actuators including heap dump, environment, and thread dump do not raise this to `EndpointPermissions.Full`, so CF's `read_sensitive_data` permission flag is not enforced for those endpoints. Spring Boot's equivalent Cloud Foundry integration gates these endpoints with `read_sensitive_data` by default. Steeltoe.Management.Endpoint 4.2.0 and Steeltoe.Management.EndpointCore 3.4.0 patch the issue. If an immediate upgrade is not possible, explicitly set `RequiredPermissions = EndpointPermissions.Full` in the options for `HeapDumpEndpointOptions`, `EnvironmentEndpointOptions`, and `ThreadDumpEndpointOptions`; and/or if heap dump, thread dump, or environment are not needed in production, register only the required actuators individually instead of using `AddAllActuators()`.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-50201 since 06/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 4.2.0 eliminates this vulnerability. Applying the patch b39defa4db5f44f8696c456866b3a5b900d8d96b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• SteeltoeOSS

Name

• Steeltoe.Management.Endpoint
• Steeltoe.Management.EndpointBase

Version

• 4.0
• 4.1

License

• open-source

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