← CVE Intelligence

CVE-2026-106500

Backstage: Improper task state validation in Scaffolder backend PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
backstage / backstageaffected < 1.49.6; affected >= 1.50.0-next.0, < 1.50.5; affected >= 1.51.0-next.0, < 1.54.6
@backstage / plugin-scaffolder-backendaffected < 3.3.1; affected >= 3.4.0, < 3.4.1; affected >= 4.0.0, < 4.0.3; affected >= 4.0.4, < 4.1.0

CWE

CWE-59, CWE-362

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.