🛡️ CVE-2026-50267 — steeltoe.configuration.abstractions

🟡 CVSS 4.7 — Medium ✅ No Known Exploit CWE-312 NVD
4.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Steeltoe: TLS private keys written to /tmp with default permissions, never deleted

Summary

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.

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 VCAP_SERVICES 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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-50267 is classified as CWE-312: Cleartext Storage of Sensitive Information. Sensitive values are written to storage unencrypted and readable by anyone with access to it.

Affected software

CVE-2026-50267 is recorded against 2 packages.

  • steeltoe.configuration.abstractions (from 4.0.0 up to 4.2.0)
  • unknown

Timeline and source

Published on 2 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)

Details

Severity Medium
CVSS Score 4.7
CVSS Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE CWE-312
Public Exploit ✅ No
Source NVD
Published 2026-07-02
Updated 2026-08-12
Modified 2026-07-02
Fix URL N/A

Affected Packages

Software From version Fixed in
steeltoe.configuration.abstractions 4.0.0 4.2.0
unknown — —

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