PatchSiren cyber security CVE debrief
CVE-2026-50200 SteeltoeOSS CVE debrief
Steeltoe.Management.Endpoint and Steeltoe.Management.EndpointCore prior to version 4.2.0 and 3.4.0 respectively, contain a high-severity vulnerability. The `Sanitizer` component in the Environment actuator does not adequately redact configuration values, particularly for .NET pattern `ConnectionStrings:<name>` and Steeltoe Connectors' `Steeltoe:Client:<type>:Default:ConnectionString`. This oversight allows full connection string values, including embedded credentials, to be returned in `/actuator/env` responses.
- Vendor
- SteeltoeOSS
- Product
- Steeltoe.Management.Endpoint
- CVSS
- HIGH 7.5
- 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 and Steeltoe.Management.EndpointCore versions prior to 4.2.0 and 3.4.0 respectively, should be aware of this vulnerability and take immediate action to mitigate the risk. This includes upgrading to the patched versions or implementing compensating controls.
Technical summary
The `Sanitizer` component in the Environment actuator of Steeltoe.Management.Endpoint and Steeltoe.Management.EndpointCore does not properly redact configuration values. Specifically, it does not cover .NET pattern `ConnectionStrings:<name>` or Steeltoe Connectors' `Steeltoe:Client:<type>:Default:ConnectionString`. As a result, full connection string values including embedded credentials are returned verbatim in `/actuator/env` responses. This vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.
Defensive priority
High
Recommended defensive actions
- Upgrade to Steeltoe.Management.Endpoint 4.2.0 or later and Steeltoe.Management.EndpointCore 3.4.0 or later
- Remove `env` from the actuator exposure list if an immediate upgrade is not possible
- Add `.*connectionstring.*` to `KeysToSanitize` as a defense-in-depth measure
- Require authorization on actuator endpoints
- 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 2026-06-17T22:16:24.453Z and was last modified on 2026-06-22T18:20:40.350Z. The NVD entry is currently Deferred. The vulnerability was reported by [email protected].
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-06-17T22:16:24.453Z and has not been modified since then. The NVD entry is currently Deferred.