CVE-2026-106501
CVE-2026-106501 · Backstage: Sensitive information exposure in Scaffolder
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.6 · Critical · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
backstage
- Versions
- < 1.49.6: Affected
- >= 1.50.0-next.0, < 1.50.5: Affected
- >= 1.51.0-next.0, < 1.54.6: Affected
No fix published
plugin-scaffolder-backend
- Versions
- < 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
No fix published
@backstage/plugin-scaffolder-backend npm
- Affected ranges
- SEMVER: < 3.3.1
Update to 3.3.1
@backstage/plugin-scaffolder-backend npm
- Affected ranges
- SEMVER: ≥ 3.4.0, < 3.4.1
Update to 3.4.1
@backstage/plugin-scaffolder-backend npm
- Affected ranges
- SEMVER: ≥ 4.0.0, < 4.0.3
Update to 4.0.3
@backstage/plugin-scaffolder-backend npm
- Affected ranges
- SEMVER: ≥ 4.0.4, < 4.1.0
Update to 4.1.0
Original sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2026-106501