要点
- CVE-2026-106490 は backstage (linuxfoundation), backstage/plugin-techdocs-backend (linuxfoundation), @backstage/plugin-techdocs-backend に影響する深刻度「中」 (CVSS 6.5) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.37%（全脆弱性の 30.9% より高い）。
- 対処：1.54.6, 2.2.4 以降に更新してください。
概要
Impact
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.
Patches
Patched in @backstage/plugin-techdocs-backend version 2.2.4
Workarounds
- Restrict access to the TechDocs backend to users who are permitted to view all stored documentation until an upgrade can be applied.
- Keep the default backend authentication policy enabled.
NVD の説明
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.
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