{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-106509","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-06T18:46:47.767Z","datePublished":"2026-10-06T21:50:07.721Z","dateUpdated":"2026-10-06T21:50:07.721Z"},"containers":{"cna":{"title":"Backstage: Improper validation of MkDocs theme configuration in TechDocs","problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-1336","lang":"en","description":"CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/backstage/backstage/security/advisories/GHSA-8w7q-29mw-gf5c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/backstage/backstage/security/advisories/GHSA-8w7q-29mw-gf5c"},{"name":"https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb","tags":["x_refsource_MISC"],"url":"https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb"},{"name":"https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d","tags":["x_refsource_MISC"],"url":"https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d"},{"name":"https://github.com/backstage/backstage/releases/tag/v1.50.5","tags":["x_refsource_MISC"],"url":"https://github.com/backstage/backstage/releases/tag/v1.50.5"},{"name":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":["x_refsource_MISC"],"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6"}],"affected":[{"vendor":"backstage","product":"backstage","versions":[{"version":"< 1.50.5","status":"affected"},{"version":">= 1.51.0-next.0, < 1.54.6","status":"affected"}]},{"vendor":"@backstage","product":"plugin-techdocs-node","versions":[{"version":"< 1.14.6","status":"affected"},{"version":">= 1.15.0, < 1.15.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-06T21:50:07.721Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-8w7q-29mw-gf5c","discovery":"UNKNOWN"}}}}