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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].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50200 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50200

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50200 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50200

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.