CVE-2026-106501
Backstage: Sensitive information exposure in Scaffolder
CRITICAL 9.6
At a glance
- Source
- NVD
- EPSS
- EPSS 0.48 % · percentile 42 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-200 — Exposure of Sensitive Information to an Unauthorized Actor
- CWE-201 — Insertion of Sensitive Information Into Sent Data
References
- https://github.com/backstage/backstage/security/advisories/GHSA-g2v8-7jhw-pp8p
- 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
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N | GitHub_M |
| CVSS 3.1 | CRITICAL 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-g2v8-7jhw-pp8p — Backstage: Sensitive information exposure in Scaffolder
European references
- ENISA EUVD · EUVD-2026-94059
- GCVE · GCVE-0-2026-106501
Affected configurations (NVD CPE)
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*< 3.3.1cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*≥ 3.4.0 < 3.4.1cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*≥ 4.0.0 < 4.0.3cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*≥ 4.0.4 < 4.1.0cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*< 1.49.6cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*≥ 1.50.0 < 1.50.5cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*≥ 1.51.0 < 1.54.6
Affected products
| Product | Versions |
|---|---|
| backstage · backstage | affected < 1.49.6 ; affected >= 1.50.0-next.0, < 1.50.5 ; affected >= 1.51.0-next.0, < 1.54.6 |
| @backstage · plugin-scaffolder-backend | affected < 3.3.1 ; affected >= 3.4.0, < 3.4.1 ; affected >= 4.0.0, < 4.0.3 ; affected >= 4.0.4, < 4.1.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |