Backstage: Incorrect authorization in search engine permission filtering

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106562
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 15:17:17 UTC
Updated2026-10-07 15:52:18 UTC
DescriptionBackstage 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-754 | CWE-863 | CWE-754 CWE-754: Improper Check for Unusual or Exceptional Conditions | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Backstage Backstage affected < 1.54.1 Not specified
CNA @backstage Plugin-search-backend affected < 2.1.6 Not specified
CNA @backstage Plugin-search-backend-module-elasticsearch affected < 1.8.7 Not specified

References

ReferenceSourceLinkTags
github.com/backstage/backstage/releases/tag/v1.54.1 [email protected] github.com
github.com/backstage/backstage/commit/2d5d3e77d630455d6d48cfa8f31fd3c126... [email protected] github.com
github.com/backstage/backstage/security/advisories/GHSA-9325-vq29-gp3v [email protected] github.com
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