CVE-2026-106490

Backstage: Improper input validation in TechDocs static content requests

State: Published
Severity: 6.5 Medium
Published: Oct 6, 2026
Updated: Oct 7, 2026
Reserved: Oct 6, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-23 Relative Path Traversal

Affected Products

Product	Versions
backstagebackstage	< 1.54.6Affected
plugin-techdocs-backend@backstage	< 2.2.4Affected

References

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