medium4.4
CVE-2026-106494
Backstage: Improper input validation in cloud storage URL readers
Impact
Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @backstage/backend-defaults | < 0.17.8 | 0.17.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxfoundation | Backstage\/Backend Defaults | before 0.17.8 |
| Linuxfoundation | Backstage | before 1.54.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-7649-wm97-w3j3
- https://github.com/backstage/backstage/security/advisories/GHSA-7649-wm97-w3j3
- https://nvd.nist.gov/vuln/detail/CVE-2026-106494
- https://github.com/backstage/backstage/commit/14e925ce5b905dd8daa64c3009722febda76034c
- https://github.com/backstage/backstage/releases/tag/v1.54.6