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CVE-2026-106500GHSA-XVGH-HMX8-9XXF

Backstage: Improper task state validation in Scaffolder backend

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.49.6, 1.50.5, 1.54.6, 3.3.1, 3.4.1, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • backstage backstage

    fixed in 1.49.6; From 1.50.0-next.0 · fixed in 1.50.5; From 1.51.0-next.0 · fixed in 1.54.6

  • @backstage plugin-scaffolder-backend

    fixed in 3.3.1; From 3.4.0 · fixed in 3.4.1; From 4.0.0 · fixed in 4.0.3; From 4.0.4 · fixed in 4.1.0

  • @backstage/plugin-scaffolder-backendnpm

    fixed in 4.1.0

References 7

GitHub · backstage/backstage