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CVE-2026-50194— Steeltoe vulnerable to management-port isolation bypass via spoofed Host header

Quick assessment

Affected
SteeltoeOSS Steeltoe.Management.Endpoint
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SteeltoeOSS Steeltoe.Management.Endpoint是SteeltoeOSS的一个应用程序管理端点组件。 SteeltoeOSS Steeltoe.Management.Endpoint 4.2.0之前版本和Steeltoe.Management.EndpointCore 3.2.2版本至3.4.0之前版本存在授权问题漏洞，该漏洞源于中间件使用Host HTTP标头而非实际网络套接字端口来限制端点访问，可能导致未经身份验证的攻击者通过网络访问绕过访问控制，获取敏感信息。

CVSS 8.2 · High EPSS 0.41% · P34

Possible ATT&CK Techniques 2 AI

T1090 · Proxy T1078 · Valid Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
SteeltoeOSS Steeltoe.Management.Endpoint < 4.2.0 affected
SteeltoeOSS Steeltoe.Management.EndpointCore >= 3.2.2, < 3.4.0 affected
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I. Basic Information for CVE-2026-50194

Vulnerability Information
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Vulnerability Title
Steeltoe vulnerable to management-port isolation bypass via spoofed Host header
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
SteeltoeOSS Steeltoe.Management.Endpoint 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SteeltoeOSS Steeltoe.Management.Endpoint是SteeltoeOSS的一个应用程序管理端点组件。 SteeltoeOSS Steeltoe.Management.Endpoint 4.2.0之前版本和Steeltoe.Management.EndpointCore 3.2.2版本至3.4.0之前版本存在授权问题漏洞，该漏洞源于中间件使用Host HTTP标头而非实际网络套接字端口来限制端点访问，可能导致未经身份验证的攻击者通过网络访问绕过访问控制，获取敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SteeltoeOSS Steeltoe.Management.Endpoint < 4.2.0 -
SteeltoeOSS Steeltoe.Management.EndpointCore >= 3.2.2, < 3.4.0 -

II. Public POCs for CVE-2026-50194

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8814 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-50194

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Patches & Fixes for CVE-2026-50194 (2)

Vendor Advisories for CVE-2026-50194 (1)

Same Patch Batch · SteeltoeOSS · 2026-06-17 · 7 CVEs total

CVE-2026-50196 7.5 HIGH Steeltoe.Discovery.Eureka: Unrecognized DataCenterInfo.Name poisons entire registry fetch
CVE-2026-50200 7.5 HIGH Steeltoe's env sanitizer misses connection strings — leaks embedded DB passwords
CVE-2026-50201 6.5 MEDIUM Steeltoe's sensitive actuators (heapdump/env) only require Restricted permission
CVE-2026-50202 5.9 MEDIUM Steeltoe's static JWKS cache shared across schemes and never invalidated
CVE-2026-50267 4.7 MEDIUM Steeltoe: TLS private keys written to /tmp with default permissions, never deleted
CVE-2026-50268 1.9 LOW Steeltoe: OAEP setting silently selects PKCS#1 v1.5 padding

IV. Related Vulnerabilities

Same product: Steeltoe.Management.Endpoint
Same vendor: SteeltoeOSS
Same weakness: CWE-288

V. Comments for CVE-2026-50194

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