All vulnerabilities
CVE-2026-106490GHSA-7mfx-xg57-53c9

@backstage/plugin-techdocs-backend: Backstage: Improper input validation in TechDocs static content requests

backstage @backstage/plugin-techdocs-backendnpmLibraries & packages
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.37%Chance of exploitation activity in the next 30 days, higher than 29% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.2.4Fixed versionGitHub
Published6 Oct 2026Updated 7 Oct 2026CVE List

What fixes it

  • 2.2.4@backstage/plugin-techdocs-backend, npmGitHubnpm install @backstage/plugin-techdocs-backend@2.2.4

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from GitHub Advisory Database

Affected versions 4

  • @backstage/plugin-techdocs-backend, npm< 2.2.4GitHub
  • backstageaffected: < 1.54.6CVE List
  • plugin-techdocs-backendaffected: < 2.2.4CVE List
  • @backstage/plugin-techdocs-backend, npmfrom first release, fixed in 2.2.4OSV

References 5