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chore(deps): update dependency @backstage/plugin-proxy-backend to v0.6.18 [security] - #93
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This PR contains the following updates:
0.6.17→0.6.18Warning
Some dependencies could not be looked up. Check the Dependency Dashboard for more information.
Backstage: Inconsistent credential enforcement for overlapping proxy routes
CVE-2026-106456 / GHSA-472h-9c5j-prrr
More information
Details
Impact
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.
Exploitation requires this specific overlapping route configuration. The resulting confidentiality and integrity impact depends on the capabilities exposed by the nested upstream.
Patches
Upgrade
@backstage/plugin-proxy-backendto version0.6.18or later. The fixed package is available in Backstage v1.55.0.Workarounds
dangerously-allow-unauthenticated.Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Backstage: Inconsistent credential enforcement for overlapping proxy routes
CVE-2026-106456 / GHSA-472h-9c5j-prrr
More information
Details
Impact
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.
Exploitation requires this specific overlapping route configuration. The resulting confidentiality and integrity impact depends on the capabilities exposed by the nested upstream.
Patches
Upgrade
@backstage/plugin-proxy-backendto version0.6.18or later. The fixed package is available in Backstage v1.55.0.Workarounds
dangerously-allow-unauthenticated.Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Release Notes
backstage/backstage (@backstage/plugin-proxy-backend)
v0.6.18Compare Source
Patch Changes
736d84e: Use locale-insensitive Unicode casing for consistent string handling across environments.42580a2: Improved request path handling in the proxy-backend.9df9292: Ensure HTTP proxy requests consistently apply their configured credential requirements.Configuration
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