CVE-2026-106458
Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates
Impact
Backstage is an open framework for building developer portals. From 0.4.0 until 0.5.15, the @backstage/plugin-catalog-backend-module-bitbucket-server package is affected by inconsistent repository filtering in bitbucket server catalog event updates. Deployments using event-driven updates in the Bitbucket Server catalog provider may ingest catalog locations from repositories that are excluded by the provider's configured project, repository, or archived-repository filters. An authenticated Bitbucket Server user who can push to a filtered-out repository that remains readable by the configured Backstage integration can trigger a legitimate repository event. The affected event path may then add a Location for that repository even though scheduled discovery excludes it. This issue is fixed in version 0.5.15.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @backstage/plugin-catalog-backend-module-bitbucket-server | >= 0.4.0, < 0.5.15 | 0.5.15 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxfoundation | Backstage\/Plugin-Catalog-Backend-Module-Bitbucket-Server | from 0.4.0 before 0.5.15 |
| Linuxfoundation | Backstage | from 1.38.0 before 1.55.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-c36c-cf6r-ghgj
- https://github.com/backstage/backstage/security/advisories/GHSA-c36c-cf6r-ghgj
- https://nvd.nist.gov/vuln/detail/CVE-2026-106458
- https://github.com/backstage/backstage/commit/989db63b6f87c8fc04d440f296ad89e10c79b363
- https://github.com/backstage/backstage/releases/tag/v1.55.0