Incorrect Authorization Affecting @backstage/plugin-search-backend package, versions <2.1.6
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-BACKSTAGEPLUGINSEARCHBACKEND-20826423
- published11 Oct 2026
- disclosed7 Oct 2026
- creditUnknown
Introduced: 7 Oct 2026
NewCVE-2026-106562 (opens in a new tab)How to fix?
Upgrade @backstage/plugin-search-backend to version 2.1.6 or higher.
Overview
@backstage/plugin-search-backend is a The Backstage backend plugin that provides your backstage app with search
Affected versions of this package are vulnerable to Incorrect Authorization in AuthorizedSearchEngine when all document types are denied by authorization policy. An authenticated attacker can issue a search query that, after authorization filtering removes all permitted document types, proceeds to query the underlying Elasticsearch engine with an empty type list rather than returning an empty result set, potentially exposing search index metadata or results that should be inaccessible. The fix short-circuits execution in both AuthorizedSearchEngine and ElasticSearchSearchEngine when the authorized document type list is empty.