{"id":"CVE-2026-106509","revision":"c26dda3cfffc4e15beb5459cd40fe32f","records":[{"revision":"c26dda3cfffc4e15beb5459cd40fe32f","observedAt":"2026-10-25T04:17:41.466+00:00","statement":{"source":"nvd","id":"CVE-2026-106509","aliases":[],"title":"Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. When TechDocs is configured to build d…","description":"Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. When TechDocs is configured to build documentation locally or in a container, a user with write access to a registered repository can include configuration values in mkdocs.yml that cause arbitrary code execution during the documentation build process. This issue is fixed in versions 1.14.6 and 1.15.4.","state":0,"publishedAt":"2026-10-06T22:17:06.463+00:00","modifiedAt":"2026-10-09T17:34:17.12+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L","score":7.7,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb","https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d","https://github.com/backstage/backstage/releases/tag/v1.50.5","https://github.com/backstage/backstage/releases/tag/v1.54.6","https://github.com/backstage/backstage/security/advisories/GHSA-8w7q-29mw-gf5c"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106509","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-94","CWE-1336"],"productCriteria":["cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:-:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next0:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next1:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next2:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next3:*:*:*:*:*:*"],"sourceDates":{"published":"2026-10-06T22:17:06.463","lastModified":"2026-10-09T17:34:17.120"},"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-2026-106509","identifiers":["CVE-2026-106509"]},"retained":false,"historicalAffected":[]}],"coverage":[]}