PatchSiren cyber security CVE debrief
CVE-2026-50201 SteeltoeOSS CVE debrief
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 mapped to Cloud Foundry's `read_basic_data` permission. 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. This issue was patched in Steeltoe.Management.Endpoint 4.2.0 and Steeltoe.Management.EndpointCore 3.4.0. As an immediate workaround, explicitly set `RequiredPermissions = EndpointPermissions.Full` in the options for `HeapDumpEndpointOptions`, `EnvironmentEndpointOptions`, and `ThreadDumpEndpointOptions`; and/or register only the required actuators individually instead of using `AddAllActuators()`.
- Vendor
- SteeltoeOSS
- Product
- Steeltoe.Management.Endpoint
- CVSS
- MEDIUM 6.5
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-17
- Original CVE updated
- 2026-06-22
- Advisory published
- 2026-06-17
- Advisory updated
- 2026-06-22
Who should care
Users of Steeltoe.Management.Endpoint prior to version 4.2.0 and Steeltoe.Management.EndpointCore prior to version 3.4.0 who utilize Cloud Foundry's permission flags for access control should verify their configurations to ensure proper access restrictions.
Technical summary
The Steeltoe.Management.Endpoint and Steeltoe.Management.EndpointCore components have a default permission setting of `EndpointPermissions.Restricted`, which aligns with Cloud Foundry's `read_basic_data` permission. However, certain sensitive actuator endpoints such as heap dump, environment, and thread dump do not elevate this to `EndpointPermissions.Full`, potentially bypassing the `read_sensitive_data` permission check in Cloud Foundry. This discrepancy was addressed in versions 4.2.0 and 3.4.0, respectively. In the interim, users can apply explicit permission settings or selective actuator registration.
Defensive priority
Medium priority should be given to upgrading to Steeltoe.Management.Endpoint 4.2.0 and Steeltoe.Management.EndpointCore 3.4.0. In cases where immediate upgrades are not feasible, implementing explicit permission settings for sensitive actuators or registering only necessary actuators can serve as effective mitigations.
Recommended defensive actions
- Upgrade to Steeltoe.Management.Endpoint 4.2.0 and Steeltoe.Management.EndpointCore 3.4.0
- Explicitly set `RequiredPermissions = EndpointPermissions.Full` for sensitive actuators
- Register only required actuators individually instead of using `AddAllActuators()`
- Review and adjust Cloud Foundry permission configurations to align with Steeltoe actuator settings
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
- Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
- Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
Evidence notes
The CVE record was published on 2026-06-17T23:17:04.313Z and was last modified on 2026-06-22T18:20:40.350Z. The NVD entry is currently Deferred. Official references include commits from the SteeltoeOSS repository and a security advisory.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-06-17T23:17:04.313Z and has not been modified since then. The NVD entry is currently Deferred.