CVE-2026-106456 (GCVE-0-2026-106456)
Vulnerability from cvelistv5
Published
2026-10-06 20:10
Modified
2026-10-07 18:24
CWE
  • CWE-863 - Incorrect Authorization
Summary
Backstage is an open framework for building developer portals. From 0.5.0 until 0.6.18, the @backstage/plugin-proxy-backend package is affected by inconsistent credential enforcement for overlapping proxy routes. An operator can configure overlapping proxy paths with different credential requirements. When a parent path permits unauthenticated access and a nested path requires credentials, the parent exemption can also cover requests handled by the nested proxy. An unauthenticated caller may therefore reach the nested upstream through Backstage, including with static upstream credentials configured for that proxy. This issue is fixed in version 0.6.18.
Impacted products
Vendor Product Version
backstage backstage Version: >= 1.28.0, < 1.55.0
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Show details on NVD website


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