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CWE-288Weakness · CWE-288

CVE-2026-50194

HIGH · 8.2 CVSS v3.1 Published 2026-06-17
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
91/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. When Steeltoe management endpoints versions 3.2.2 through 3.3.0 and 4.1.0 are configured to listen on an alternate port (`Management:Endpoints:Port` is configured), the middleware responsible for restricting access to the endpoints uses the `Host` HTTP header rather than the actual network socket port. Versions 3.4.0 and 4.2.0 patch the issue. If an immediate upgrade to a patched version is not possible, add explicit ASP.NET Core authorization (`RequireAuthorization`) to all sensitive actuator endpoints as a defense-in-depth measure independent of port isolation and/or configure the reverse proxy or load balancer to enforce the `Host` header value and prevent clients from setting an arbitrary port.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

Steeltoe 3.4.0 (for 3.x line) or Steeltoe 4.2.0 (for 4.x line)

  1. 1. Identify your current Steeltoe version by checking your project dependencies (e.g., in .csproj or packages.config)
  2. 2. Determine which major version line you are using (3.x or 4.x)
  3. 3. For Steeltoe 3.x users: Upgrade to version 3.4.0 or later
  4. 4. For Steeltoe 4.x users: Upgrade to version 4.2.0 or later
  5. 5. Update the package reference in your project file (e.g., <PackageReference Include="Steeltoe.Management.Endpoint" Version="3.4.0" /> for 3.x)
  6. 6. Rebuild and redeploy your application
  7. 7. Verify management endpoints are accessible only on the intended alternate port after the upgrade
Caveat Review Steeltoe release notes for your version line to check for any breaking changes between your current version and the target upgrade version

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-50194 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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