Vulnerability in Steeltoeoss Steeltoe.configuration.abstractions
CVE-2026-50267
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`.
EPSS: 0.001 (0.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Steeltoeoss Steeltoe.configuration.abstractions — versions >= 4.0.0, < 4.2.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-50267?
- CVE-2026-50267 is a medium-severity vulnerability in Steeltoeoss Steeltoe.configuration.abstractions, classified under Cleartext Storage of Sensitive Information. CVSS score: 4.7/10. Published 2026-06-17.
- How severe is CVE-2026-50267?
- Medium severity. CVSS v3 base score is 4.7 out of 10.