CVE-2026-106500
highBackstage is an open framework for building developer portals.
Vendor / product: Linuxfoundation — backstage\/plugin-scaffolder-backend
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 improper task state validation in scaffolder backend. An authenticated user with permission to create and access Scaffolder tasks may, under specific timing and deployment conditions, affect files accessible to the Backstage backend. If backend application files are writable, the confidentiality, integrity, and availability of the backend may be compromised. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/backstage/backstage/commit/0d24f1b8701f3dde6cd597f81997c1ea873a43ae security-advisories@github.com
- https://github.com/backstage/backstage/commit/56be299dd3ef6706e13e76ea2f8a9b0dd0b6413d security-advisories@github.com
- https://github.com/backstage/backstage/commit/9e86c95a1a3ddfd54db03731cd8678aa63495175 security-advisories@github.com
- https://github.com/backstage/backstage/releases/tag/v1.49.6 security-advisories@github.com
- https://github.com/backstage/backstage/releases/tag/v1.50.5 security-advisories@github.com
- https://github.com/backstage/backstage/releases/tag/v1.54.6 security-advisories@github.com
- https://github.com/backstage/backstage/security/advisories/GHSA-xvgh-hmx8-9xxf security-advisories@github.com