CVE-2026-106490

Backstage: Improper input validation in TechDocs static content requests

Published Oct 6, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
Backstage is an open framework for building developer portals. Prior to 2.2.4, the @backstage/plugin-techdocs-backend package is affected by improper input validation in techdocs static content requests. When using the Azure Blob Storage provider, an authenticated Backstage user may be able to read restricted TechDocs content when entity-level permissions are enabled. Deployments that intentionally disable the default backend authentication policy may have broader exposure. This issue is fixed in version 2.2.4.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-7mfx-xg57-53c9 Backstage: Improper input validation in TechDocs static content requests
History
Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/plugin-techdocs-backend
CPEs cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:backstage\/plugin-techdocs-backend:*:*:*:*:*:node.js:*:*
Vendors & Products Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/plugin-techdocs-backend
Type Values Removed Values Added
First Time appeared Backstage
Backstage backstage
Backstage plugin-techdocs-backend
Vendors & Products Backstage
Backstage backstage
Backstage plugin-techdocs-backend
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 2.2.4, the @backstage/plugin-techdocs-backend package is affected by improper input validation in techdocs static content requests. When using the Azure Blob Storage provider, an authenticated Backstage user may be able to read restricted TechDocs content when entity-level permissions are enabled. Deployments that intentionally disable the default backend authentication policy may have broader exposure. This issue is fixed in version 2.2.4.
Title Backstage: Improper input validation in TechDocs static content requests
Weaknesses CWE-22
CWE-23
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 7, 2026, 5:06 PM
Reserved
Oct 6, 2026, 6:46 PM
Status
Analyzed
Published
Oct 6, 2026, 9:17 PM
Modified
Oct 22, 2026, 2:40 PM