Detections
Analytics
CVE-2026-106498
high
Description
Backstage is an open framework for building developer portals. Prior to 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1, the @backstage/plugin-catalog-backend package is affected by improper url validation in catalog entity placeholder resolution. An 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. This issue is fixed in versions 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1.
References
https://github.com/backstage/backstage/security/advisories/GHSA-qgvj-qcf8-xq73
https://github.com/backstage/backstage/releases/tag/v1.54.6
https://github.com/backstage/backstage/releases/tag/v1.53.2
https://github.com/backstage/backstage/releases/tag/v1.51.3
https://github.com/backstage/backstage/releases/tag/v1.50.5
https://github.com/backstage/backstage/releases/tag/v1.49.6
https://github.com/backstage/backstage/commit/e786ac309ed2d775daf2309393c015c43902d6f6
https://github.com/backstage/backstage/commit/99729e925fd2bd40ba210022351a0ee6318e6197
https://github.com/backstage/backstage/commit/61a10f19926aeda7f4a32de48d733e6710584634
https://github.com/backstage/backstage/commit/286bfc1f9cc3608a073b41016be302785be385d1
https://github.com/backstage/backstage/commit/0b0f6fc89b4eb4872c76a498abbe1dc65998bb6e