Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. In Steeltoe.Configuration.Abstractions 4.0.0 through 4.1.0, when MySQL or PostgreSQL service bindings from "VCAP_SERVICES" include TLS client credentials, the Connectors library writes those credentials to temporary files in "Path.GetTempPath()" using "File.CreateText". On Linux, "File.CreateText" creates files with mode "0644" (world-readable) under the process umask, and the files are never deleted. The same key material is protected at mode "0400" in "/proc/<pid>/environ". Steeltoe.Configuration.Abstractions version 4.2.0 patches the issue. If an immediate upgrade is not possible, prevent other processes from running in the container under a different UID with access to "/tmp".