high8.5
CVE-2026-106459
Backstage: Improper input validation in Sentry scaffolder actions
Impact
Backstage is an open framework for building developer portals. From 0.3.0 until 0.3.8, the @backstage/plugin-scaffolder-backend-module-sentry package is affected by improper input validation in sentry scaffolder actions. An authenticated internal user who can execute the affected actions may cause the backend to contact unintended destinations and disclose Sentry integration credentials. Subsequent impact depends on network reachability and the privileges granted to the configured token. This issue is fixed in version 0.3.8.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @backstage/plugin-scaffolder-backend-module-sentry | >= 0.3.0, < 0.3.8 | 0.3.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxfoundation | Backstage\/Plugin-Scaffolder-Backend-Module-Sentry | from 0.3.0 before 0.3.8 |
| Linuxfoundation | Backstage | from 1.47.0 before 1.54.8 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-g734-fhp4-7mfp
- https://github.com/backstage/backstage/security/advisories/GHSA-g734-fhp4-7mfp
- https://nvd.nist.gov/vuln/detail/CVE-2026-106459
- https://github.com/backstage/backstage/commit/b0170fad7962fb8c3d71366b5265cf283c7bbcf7
- https://github.com/backstage/backstage/releases/tag/v1.54.8
- https://github.com/backstage/backstage/releases/tag/v1.55.0