{"id":"GHSA-qgvj-qcf8-xq73","revision":"8cad5a65dd7b43c48a7b513daf94abd3","records":[{"revision":"8cad5a65dd7b43c48a7b513daf94abd3","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-qgvj-qcf8-xq73","aliases":["CVE-2026-106498"],"title":"Backstage: Improper URL validation in catalog entity placeholder resolution","description":"### Impact\n\nAn authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user.\n\n### Patches\n\nPatched in `@backstage/plugin-catalog-backend` version `3.9.1`\n\n### Workarounds\n\nIf you're not able to update immediately:\n\n- Limit the scope of integration credentials (e.g., GitHub tokens) to only the repositories that Backstage needs to access.","state":0,"publishedAt":"2026-10-07T17:59:24+00:00","modifiedAt":"2026-10-07T18:15:10.71057+00:00","affected":[{"ecosystem":"npm","name":"@backstage/plugin-catalog-backend","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.9.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-qgvj-qcf8-xq73","https://nvd.nist.gov/vuln/detail/CVE-2026-106498","https://github.com/backstage/backstage/commit/0b0f6fc89b4eb4872c76a498abbe1dc65998bb6e","https://github.com/backstage/backstage/commit/286bfc1f9cc3608a073b41016be302785be385d1","https://github.com/backstage/backstage/commit/61a10f19926aeda7f4a32de48d733e6710584634","https://github.com/backstage/backstage/commit/99729e925fd2bd40ba210022351a0ee6318e6197","https://github.com/backstage/backstage/commit/e786ac309ed2d775daf2309393c015c43902d6f6","https://github.com/backstage/backstage","https://github.com/backstage/backstage/releases/tag/v1.49.6","https://github.com/backstage/backstage/releases/tag/v1.50.5","https://github.com/backstage/backstage/releases/tag/v1.51.3","https://github.com/backstage/backstage/releases/tag/v1.53.2","https://github.com/backstage/backstage/releases/tag/v1.54.6"],"sourceUrl":"https://github.com/advisories/GHSA-qgvj-qcf8-xq73","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-qgvj-qcf8-xq73","identifiers":["GHSA-qgvj-qcf8-xq73","CVE-2026-106498"]},"retained":false,"historicalAffected":[]}],"coverage":[]}