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CVE-2026-106562— Backstage: Incorrect authorization in search engine permission filtering

Quick assessment

Affected
backstage backstage
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Backstage 是一个用于构建开发者门户的开源框架。在 @backstage/plugin-search-backend 版本低于 2.1.6、以及 @backstage/plugin-search-backend-module-elasticsearch 版本低于 1.8.7 的情况下，搜索引擎的权限过滤机制存在缺陷，可能会返回被策略拒绝的文档。在启用了权限控制（permission.enabled 设置为 true）且使用 Elasticsearch 或 OpenSearch 作为后端的部署环境中，若某个已

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-106562

Vulnerability Information
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Vulnerability Title
Backstage: Incorrect authorization in search engine permission filtering
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对因果或异常条件的不恰当检查
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
backstage backstage < 1.54.1 -
@backstage plugin-search-backend < 2.1.6 -
@backstage plugin-search-backend-module-elasticsearch < 1.8.7 -

II. Public POCs for CVE-2026-106562

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III. Intelligence Information for CVE-2026-106562

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Other References for CVE-2026-106562 (3)

Same Patch Batch · backstage · 2026-10-07 · 8 CVEs total

CVE-2026-106558 8.8 HIGH Backstage: Improper validation of TechDocs MkDocs configuration
CVE-2026-106510 7.7 HIGH Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
CVE-2026-106556 7.7 HIGH Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization
CVE-2026-106560 7.1 HIGH Backstage: Improper repository path validation in a Scaffolder backend module
CVE-2026-106559 6.3 MEDIUM Backstage: Improper input validation in Confluence to Markdown scaffolder module
CVE-2026-106563 5.3 MEDIUM Backstage: Improper entity validation in deprecated Kubernetes services endpoint
CVE-2026-106561 5.0 MEDIUM Backstage: Sensitive information disclosure in Kubernetes resource queries

IV. Related Vulnerabilities

Same product: backstage
Same vendor: backstage
Same weakness: CWE-754

V. Comments for CVE-2026-106562

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