9.6
Critical
CVE-2026-106501 Backstage is an open framework for building developer portals
Description
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| backstage 1.51 | 1.51.0-next.0 → < 1.54.6 | 1.54.6 |
| backstage 1.50 | 1.50.0-next.0 → < 1.50.5 | 1.50.5 |
| backstage 1.49 | earliest → < 1.49.6 | 1.49.6 |
| plugin-scaffolder-backend 4.0 | 4.0.0 → < 4.1.0 | 4.0.3 |
| plugin-scaffolder-backend 3.4 | 3.4.0 → < 3.4.1 | 3.4.1 |
| plugin-scaffolder-backend 3.3 | earliest → < 3.3.1 | 3.3.1 |
Other CVEs of backstage
The 69 CVEs of backstage →
CVE-2026-115923
Backstage is an open framework for building developer portals
6.5
Medium
CVE-2026-106495
Backstage is an open framework for building developer portals
4.3
Medium
CVE-2026-106557
Backstage is an open framework for building developer portals
7.7
High
CVE-2026-106563
Backstage is an open framework for building developer portals
5.3
Medium