CVE-2026-106501
Backstage: Sensitive information exposure in Scaffolder
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | Critical9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.48% · top 58% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.6.
Weakness
Affected products
- 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
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@backstage/plugin-scaffolder-backendGHSA-g2v8-7jhw-pp8p (opens in a new tab)
References (7)
- https://github.com/backstage/backstage/security/advisories/GHSA-g2v8-7jhw-pp8p (opens in a new tab)x_refsource_CONFIRM
- https://github.com/backstage/backstage/commit/66d2219edf0abe33ab7d0c1ced5d069d1e065be5 (opens in a new tab)x_refsource_MISC
- https://github.com/backstage/backstage/commit/c19838870476a8e29144c84b1a5ac0654ec20fb5 (opens in a new tab)x_refsource_MISC
- https://github.com/backstage/backstage/commit/e262d649981ff99bb01ca7077807ae3e25e85560 (opens in a new tab)x_refsource_MISC
- https://github.com/backstage/backstage/releases/tag/v1.49.6 (opens in a new tab)x_refsource_MISC
- https://github.com/backstage/backstage/releases/tag/v1.50.5 (opens in a new tab)x_refsource_MISC
- https://github.com/backstage/backstage/releases/tag/v1.54.6 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-g2v8-7jhw-pp8p (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-106501)Record last updated .