CVE-2026-50267 is a medium-severity incorrect permission assignment for critical resource vulnerability in Steeltoe.Configuration.Abstractions (nuget), affecting versions >= 4.0.0, <= 4.1.0. It is fixed in 4.2.0.
Summary When MySQL or PostgreSQL service bindings from VCAPSERVICES 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. Impact Any process co-located in the container that runs as a different UID can read the TLS client private key from /tmp and use it to impersonate the application when connecting to the backing database over mutual TLS. Affected configuration Application is deployed on Cloud Foundry or another environment that populates VCAPSERVICES with a MySQL or PostgreSQL service binding that includes sslKey credentials. A process running as a different UID shares the container's filesystem. Mitigations If an immediate upgrade is not possible, prevent other processes from running in the container under a different UID with access to /tmp.
A file, directory, or other resource is assigned permissions that allow broader access than intended. Typical impact: unauthorized read, modification, or execution of the resource.
CVE-2026-50267 has a CVSS score of 4.7 (Medium). The vector is requires local access, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (4.2.0). Upgrading removes the vulnerable code path.
nuget
Steeltoe.Configuration.Abstractions (>= 4.0.0, <= 4.1.0)Steeltoe.Configuration.Abstractions → 4.2.0 (nuget)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
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Already deployed Kodem? See CVE-2026-50267 in your environment →Upgrade Steeltoe.Configuration.Abstractions to 4.2.0 or later to resolve this vulnerability.
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CVE-2026-50267 is a medium-severity incorrect permission assignment for critical resource vulnerability in Steeltoe.Configuration.Abstractions (nuget), affecting versions >= 4.0.0, <= 4.1.0. It is fixed in 4.2.0. A file, directory, or other resource is assigned permissions that allow broader access than intended.
CVE-2026-50267 has a CVSS score of 4.7 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Steeltoe.Configuration.Abstractions (nuget) versions >= 4.0.0, <= 4.1.0 is affected.
Yes. CVE-2026-50267 is fixed in 4.2.0. Upgrade to this version or later.
Whether CVE-2026-50267 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade Steeltoe.Configuration.Abstractions to 4.2.0 or later.