🛡️ CVE-2026-50194 — steeltoe.management.endpoint

🟠 CVSS 8.2 — High ✅ No Known Exploit CWE-288 NVD
8.2
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Steeltoe vulnerable to management-port isolation bypass via spoofed Host header

Summary

When Steeltoe management endpoints 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.

Impact

An unauthenticated remote attacker can reach every actuator endpoint using a specially crafted HTTP request.

Affected configuration

  • The application's public port is accessible over from the network.
  • Management:Endpoints:Port is configured to a value different from the application's main listener port.
  • The request scheme matches Management:Endpoints:SslEnabled. For example, http when SslEnabled is false (the default), or https when SslEnabled is true.

Mitigations

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.
  • Configure the reverse proxy or load balancer to enforce the Host header value and prevent clients from setting an arbitrary port.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity low, availability none.

Weakness class

CVE-2026-50194 is classified as CWE-288: Authentication Bypass Using an Alternate Path. A secondary route into the application skips the authentication that the primary route enforces.

Affected software

CVE-2026-50194 is recorded against 3 packages.

  • steeltoe.management.endpoint (fixed in 4.2.0)
  • steeltoe.management.endpointcore (from 3.2.2 up to 3.4.0)
  • unknown

Timeline and source

Published on 2 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)

Details

Severity HIGH
CVSS Score 8.2
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE CWE-288
Public Exploit ✅ No
Source NVD
Published 2026-07-02
Updated 2026-08-12
Modified 2026-07-02
Fix URL N/A

Affected Packages

Software From version Fixed in
steeltoe.management.endpoint — 4.2.0
steeltoe.management.endpointcore 3.2.2 3.4.0
unknown — —

Similar Threats

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