CVE-2026-106501
critical · 9.6Backstage 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.
9.6
CVSS
0.5%
EPSS (exploit prob.)
41st
EPSS percentile
2026-10-06
Published
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Weaknesses
CWE-200CWE-201
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| linuxfoundation | backstage/plugin-scaffolder-backend | < 3.3.1 |
| linuxfoundation | backstage/plugin-scaffolder-backend | >= 3.4.0, < 3.4.1 |
| linuxfoundation | backstage/plugin-scaffolder-backend | >= 4.0.0, < 4.0.3 |
| linuxfoundation | backstage/plugin-scaffolder-backend | >= 4.0.4, < 4.1.0 |
| linuxfoundation | backstage | < 1.49.6 |
| linuxfoundation | backstage | >= 1.50.0, < 1.50.5 |
| linuxfoundation | backstage | >= 1.51.0, < 1.54.6 |
Check a specific version with /api/v1/cve/match.
References
- https://github.com/backstage/backstage/commit/66d2219edf0abe33ab7d0c1ced5d069d1e065be5
- https://github.com/backstage/backstage/commit/c19838870476a8e29144c84b1a5ac0654ec20fb5
- https://github.com/backstage/backstage/commit/e262d649981ff99bb01ca7077807ae3e25e85560
- https://github.com/backstage/backstage/releases/tag/v1.49.6
- https://github.com/backstage/backstage/releases/tag/v1.50.5
- https://github.com/backstage/backstage/releases/tag/v1.54.6
- https://github.com/backstage/backstage/security/advisories/GHSA-g2v8-7jhw-pp8p
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-106501