Backstage: Improper input validation in TechDocs static content requests
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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @backstage/plugin-techdocs-backend | < 2.2.4 | 2.2.4 |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-7mfx-xg57-53c9
- https://nvd.nist.gov/vuln/detail/CVE-2026-106490
- https://github.com/backstage/backstage/commit/40ecc4c2e88b0218125b0a3405d1f6315b321974
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.54.6
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-22, CWE-23- Platform
- npm
- Package
@backstage/plugin-techdocs-backend- Disclosed
- 07.10.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-7mfx-xg57-53c9 - CC BY 4.0
Vulnerability history: @backstage/plugin-techdocs-backend
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 09.2024 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 3
Disclosures per year
- 2024: 2
- 2025: 0
- 2026: 2
-
Backstage: Improper input validation in TechDocs static content requests this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.