Vulnerability · Published Jun 17, 2026 · Assigned by GitHub_M
CVE-2026-50200Steeltoe's env sanitizer misses connection strings — leaks embedded DB passwords
High 7.5
In plain English
A high-severity information exposure in Steeltoe.Management.Endpoint from SteeltoeOSS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | steeltoe.management.endpoint | 4.2.0 | GHSA-q62h-354g-5r85 |
| NuGet | steeltoe.management.endpointcore | 3.4.0 | GHSA-q62h-354g-5r85 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SteeltoeOSS | Steeltoe.Management.Endpoint | < 4.2.0 |
| SteeltoeOSS | Steeltoe.Management.EndpointCore | < 3.4.0 |
Weakness: CWE-200, CWE-319 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/SteeltoeOSS/security-advisories/security/advisories/GHSA-q62h-354g-5r85 x_refsource_CONFIRM
- https://github.com/SteeltoeOSS/Steeltoe/commit/bef9f14b710232fca3fbe87e48fdd1b9e6b60d43 x_refsource_MISC
- https://github.com/SteeltoeOSS/Steeltoe/commit/e50cd31a429b191841120f0d38fa9dda8f751b0a x_refsource_MISC