CVE-2026-106500 - Backstage: Improper task state validation in Scaffolder backend
CVE ID :CVE-2026-106500
Published : Oct. 6, 2026, 10:17 p.m. | 1 hour, 28 minutes ago
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 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.
Severity: 8.5 | HIGH
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Published : Oct. 6, 2026, 10:17 p.m. | 1 hour, 28 minutes ago
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 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.
Severity: 8.5 | HIGH
Visit the link for more details, such as CVSS details, affected products, timeline, and more...