{"id":"CVE-2026-50267","revision":null,"records":[{"revision":"a42d68fe35de42fcbe7f93b68a473961","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-50267","aliases":[],"title":"Steeltoe: TLS private keys written to /tmp with default permissions, never deleted","description":"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`.","state":0,"publishedAt":"2026-06-17T21:57:09.043+00:00","modifiedAt":"2026-06-18T19:11:04.674+00:00","affected":[{"ecosystem":"Vendor product","name":"Steeltoe.Configuration.Abstractions","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"SteeltoeOSS\",\n                    \"product\": \"Steeltoe.Configuration.Abstractions\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 4.0.0, < 4.2.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":4.7,"severity":"MEDIUM"}],"references":["https://github.com/SteeltoeOSS/security-advisories/security/advisories/GHSA-rxrh-4j9h-xgg9","https://github.com/SteeltoeOSS/Steeltoe/commit/8dd97cc6c4b184121a4bd1f92f9ac16918433471"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50267","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-50267","identifiers":["CVE-2026-50267"]},"retained":false,"historicalAffected":[]},{"revision":"f6f32e56953641d9ba66f990e53ab906","observedAt":"2026-11-07T11:33:22.613+00:00","statement":{"source":"euvd","id":"EUVD-2026-37820","aliases":["CVE-2026-50267","GHSA-rxrh-4j9h-xgg9"],"title":"Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. 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If an immediate upgrade is not possible, prevent other processes from running in the container under a different UID with access to `/tmp`.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":4.7,"severity":null}],"references":["https://github.com/SteeltoeOSS/security-advisories/security/advisories/GHSA-rxrh-4j9h-xgg9","https://github.com/SteeltoeOSS/Steeltoe/commit/8dd97cc6c4b184121a4bd1f92f9ac16918433471"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-37820","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 17, 2026, 9:57:09 PM","dateUpdated":"Jun 18, 2026, 7:11:04 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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`.","state":0,"publishedAt":"2026-06-17T23:17:04.59+00:00","modifiedAt":"2026-10-26T11:10:00.157+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":4.7,"severity":"MEDIUM"}],"references":["https://github.com/SteeltoeOSS/Steeltoe/commit/8dd97cc6c4b184121a4bd1f92f9ac16918433471","https://github.com/SteeltoeOSS/security-advisories/security/advisories/GHSA-rxrh-4j9h-xgg9"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50267","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-312","CWE-732"],"productCriteria":[],"sourceDates":{"published":"2026-06-17T23:17:04.590","lastModified":"2026-10-26T11:10:00.157"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-50267","identifiers":["CVE-2026-50267"]},"retained":false,"historicalAffected":[]},{"revision":"df8780b87f314bbe8400418be953302d","observedAt":"2026-10-23T16:01:25.029+00:00","statement":{"source":"osv","id":"GHSA-rxrh-4j9h-xgg9","aliases":["CVE-2026-50267"],"title":"Steeltoe: TLS private keys written to /tmp with default permissions, never deleted","description":"### Summary\n\nWhen 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`.\n\n### Impact\n\nAny 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.\n\n### Affected configuration\n\n- Application is deployed on Cloud Foundry or another environment that populates `VCAP_SERVICES` with a MySQL or PostgreSQL service binding that includes `sslKey` credentials.\n- A process running as a different UID shares the container's filesystem.\n\n### Mitigations\n\nIf an immediate upgrade is not possible, prevent other processes from running in the container under a different UID with access to `/tmp`.","state":0,"publishedAt":"2026-07-02T20:32:09+00:00","modifiedAt":"2026-07-02T20:56:33.690158+00:00","affected":[{"ecosystem":"NuGet","name":"Steeltoe.Configuration.Abstractions","ranges":[{"type":"ECOSYSTEM","events":[{"kind":"introduced","version":"4.0.0"},{"kind":"fixed","version":"4.2.0"}]}],"versions":["4.0.0","4.1.0"],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/SteeltoeOSS/security-advisories/security/advisories/GHSA-rxrh-4j9h-xgg9","https://nvd.nist.gov/vuln/detail/CVE-2026-50267","https://github.com/SteeltoeOSS/Steeltoe/commit/8dd97cc6c4b184121a4bd1f92f9ac16918433471","https://github.com/SteeltoeOSS/security-advisories"],"sourceUrl":"https://github.com/advisories/GHSA-rxrh-4j9h-xgg9","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-rxrh-4j9h-xgg9","identifiers":["GHSA-rxrh-4j9h-xgg9","CVE-2026-50267"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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