CVE-2026-106490 · GHSA-7mfx-xg57-53c9
Backstage: Improper input validation in TechDocs static content requests
- Risk score
- 50/100
- CVSS
- 6.5 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 6 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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…
- Affected
- @backstage/plugin-techdocs-backend (npm) < 2.2.4
- Fix
- Upgrade @backstage/plugin-techdocs-backend to 2.2.4 or later.
- Exploitation
- No known exploitation
Story map
At a glance
@backstage/plugin-techdocs-backend: Yellow, plan it in. 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…
The flaws
- CVE-2026-106490: Backstage: Improper input validation in TechDocs static content requests (CVSS 6.5 · EPSS 0%)
- CVE-2026-106489: Backstage: Improper authorization enforcement for TechDocs static content (CVSS 6.5 · EPSS 0%)
The fix
Upgrade @backstage/plugin-techdocs-backend: 2.2.4 or later on your release line
Who is exposed: @backstage/plugin-techdocs-backend (npm) < 2.2.4
Where it stands
- No known exploitation
Connects to
- Same weakness: Path traversal (CWE-22). 398 other warnings in 30 days
Why it is Yellow
- CVSS 6.5 medium
- On your watchlist: npm
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| @backstage/plugin-techdocs-backend | npm | < 2.2.4 | 2.2.4 |
References
- https://github.com/advisories/GHSA-7mfx-xg57-53c9
- 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/releases/tag/v1.54.6
- https://github.com/advisories/GHSA-7mfx-xg57-53c9
Original 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.
Last activity 6 Oct 2026. Patch Forecast updates every hour.