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CVE-2026-50200— Steeltoe's env sanitizer misses connection strings — leaks embedded DB passwords

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 3.4.0之前版本存在信息泄露漏洞，该漏洞源于Environment actuator中的Sanitizer组件配置清理不当，默认后缀列表未覆盖ConnectionStrings模式，可能导致完整连接字符串信

CVSS 7.5 · High EPSS 0.31% · P21

Affected Version Matrix 2

VendorProduct Version RangeStatus
SteeltoeOSS Steeltoe.Management.Endpoint < 4.2.0 affected
SteeltoeOSS Steeltoe.Management.EndpointCore < 3.4.0 affected
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I. Basic Information for CVE-2026-50200

Vulnerability Information
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Vulnerability Title
Steeltoe's env sanitizer misses connection strings — leaks embedded DB passwords
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. In Steeltoe.Management.Endpoint prior to version 4.2.0 and Steeltoe.Management.EndpointCore prior to version 3.4.0, the `Sanitizer` component in the Environment actuator redacts configuration values by matching the configuration key name against a suffix list. The default list (`password`, `secret`, `key`, `token`, `.*credentials.*`, `vcap_services`) does not cover the standard .NET pattern `ConnectionStrings:<name>` or Steeltoe Connectors' `Steeltoe:Client:<type>:Default:ConnectionString`. There is no value-based scrubbing, so full connection string values including embedded `Password=` and `user:pass@host` segments are returned verbatim in `/actuator/env` responses. Steeltoe.Management.Endpoint 4.2.0 and Steeltoe.Management.EndpointCore 3.4.0 patch the issue. If an immediate upgrade is not possible: On the standard path, remove `env` from the actuator exposure list; add `.*connectionstring.*` to `KeysToSanitize` as a defense-in-depth measure for both paths; and/or require authorization on actuator endpoints.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
SteeltoeOSS Steeltoe.Management.Endpoint 信息泄露漏洞
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 3.4.0之前版本存在信息泄露漏洞，该漏洞源于Environment actuator中的Sanitizer组件配置清理不当，默认后缀列表未覆盖ConnectionStrings模式，可能导致完整连接字符串信
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 < 3.4.0 -

II. Public POCs for CVE-2026-50200

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9773 chars
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III. Intelligence Information for CVE-2026-50200

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Patches & Fixes for CVE-2026-50200 (2)

Vendor Advisories for CVE-2026-50200 (1)

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

CVE-2026-50194 8.2 HIGH Steeltoe vulnerable to management-port isolation bypass via spoofed Host header
CVE-2026-50196 7.5 HIGH Steeltoe.Discovery.Eureka: Unrecognized DataCenterInfo.Name poisons entire registry fetch
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-200

V. Comments for CVE-2026-50200

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