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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-106490US | — | — | ||
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 s… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/backstage/backstagePACKAGE
- https://github.com/backstage/backstage/commit/40ecc4c2e88b0218125b0a3405d1f6315b321974WEB
- https://github.com/backstage/backstage/releases/tag/v1.54.6WEB
- https://github.com/backstage/backstage/security/advisories/GHSA-7mfx-xg57-53c9WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-106490ADVISORY
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