CVE-2026-106562: @backstage Plugin-Search-Backend

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Backstage is an open framework for building developer portals. Prior to 2.1.6 in @backstage/plugin-search-backend and 1.8.7 in @backstage/plugin-search-backend-module-elasticsearch, search engine permission filtering could return documents denied by policy. An authenticated Backstage user subject to a DENY policy for search document types could receive unauthorized results in deployments with permission.enabled set to true and an Elasticsearch or OpenSearch backend. This issue is fixed in @backstage/plugin-search-backend 2.1.6 and @backstage/plugin-search-backend-module-elasticsearch 1.8.7.

Affected products

• @backstage Plugin-Search-Backend: before 2.1.6 (fixed in 2.1.6)
• @backstage Plugin-Search-Backend-Module-Elasticsearch: before 1.8.7 (fixed in 1.8.7)
• Backstage Backstage: before 1.54.1 (fixed in 1.54.1)

Published 2026-10-07. Last modified 2026-10-07.