What is CVE-2026-106562?

CVE-2026-106562 is a medium-severity vulnerability in @Backstage Plugin-Search-Backend, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 4.3/10. Published 2026-10-07.

How severe is CVE-2026-106562?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in @Backstage Plugin-Search-Backend

CVE-2026-106562

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.

Published 2026-10-07 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

@Backstage Plugin-Search-Backend — versions < 2.1.6
@Backstage Plugin-Search-Backend-Module-Elasticsearch — versions < 1.8.7
Backstage — versions < 1.54.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-106562?: CVE-2026-106562 is a medium-severity vulnerability in @Backstage Plugin-Search-Backend, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 4.3/10. Published 2026-10-07.
How severe is CVE-2026-106562?: Medium severity. CVSS v3 base score is 4.3 out of 10.