{"id":"GHSA-4488-j8vj-vqqv","revision":"d718c5323c654f25aa4200080e977066","records":[{"revision":"d718c5323c654f25aa4200080e977066","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-4488-j8vj-vqqv","aliases":["CVE-2026-106510"],"title":"Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml","description":"### Impact\n\nAn authenticated user who can register catalog entities can provide a crafted `mkdocs.yml` causing arbitrary OS command execution on the TechDocs build host when the docs are built.\n\n### Patches\n\nPatched in `@backstage/plugin-techdocs-node`, version `1.15.4`.\n\n### Workarounds\n\nIf you cannot upgrade immediately:\n\n- Switch to `techdocs.builder: external` to isolate TechDocs builds in a container.\n- Restrict who can register catalog entities with TechDocs annotations.\n- Audit existing catalog entities for suspicious `markdown_extensions` values in their `mkdocs.yml` files.","state":0,"publishedAt":"2026-10-07T18:03:22+00:00","modifiedAt":"2026-10-07T18:15:10.7178944+00:00","affected":[{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.15.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-4488-j8vj-vqqv","https://nvd.nist.gov/vuln/detail/CVE-2026-106510","https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb","https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d","https://github.com/backstage/backstage","https://github.com/backstage/backstage/releases/tag/v1.50.5","https://github.com/backstage/backstage/releases/tag/v1.54.6"],"sourceUrl":"https://github.com/advisories/GHSA-4488-j8vj-vqqv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-4488-j8vj-vqqv","identifiers":["GHSA-4488-j8vj-vqqv","CVE-2026-106510"]},"retained":false,"historicalAffected":[]}],"coverage":[]}