CVE-2026-106494
Medium
Description
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.
SeverityMedium
CVSS4.4
Exploit probability—
Product
Linuxfoundation Backstage
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-22Path traversalCWE-73CWE-73
How to fix
Update
- linuxfoundation backstage1.54.6 or later
- linuxfoundation backstage\/backend_defaults0.17.8 or later
- @backstage/backend-defaults0.17.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation backstage | v < 1.54.6 | 1.54.6 |
| linuxfoundation backstage\/backend_defaults | v < 0.17.8 | 0.17.8 |
| @backstage/backend-defaultsnpm | v < 0.17.8 | 0.17.8 |
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