CVE-2026-106562

mediumpriority · track · 0OT risk · elevatedEPSS 0.002 · 9 %ileUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.20% (9th) EPSS

CVSS 4.3 · medium

Is it mine?

5 products

Check your exposure

Who says so?

2 sources

nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · security-advisories@github.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · OSV

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USCWE-754USCWE-863USCWE-863US

affected products (5)

Products and version ranges known to be affected.

linuxfoundation backstage< 1.54.1nvdUScpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
linuxfoundation backstage/plugin-search-backend< 2.1.6nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-search-backend:*:*:*:*:*:*:*:*
linuxfoundation backstage/plugin-search-backend-module-elasticsearch< 1.8.7nvdUScpe:2.3:a:linuxfoundation:backstage\/plugin-search-backend-module-elasticsearch:*:*:*:*:*:*:*:*
npm @backstage/plugin-search-backend< 2.1.6osvUSpkg:npm/%40backstage/plugin-search-backend
npm @backstage/plugin-search-backend-module-elasticsearch< 1.8.7osvUSpkg:npm/%40backstage/plugin-search-backend-module-elasticsearch

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-9325-vq29-gp3vBackstage has incorrect authorization in search engine permission filtering2026-10-07ghsa · osvUS
### Impact An authenticated Backstage user subject to a `DENY` policy for search document types could receive search results they were not authorized to view. This affects deployments with `permission.enabled: true` and an Elasticsearch or OpenSearch search backend. ### Patches - Upgrade `@backstage/plugin-search-backend` to 2.1.6 - Upgrade `@backstage/plugin-search-backend-module-elasticsearch` to 1.8.7 ### Workarounds If you are unable to upgrade immediately: - Temporarily modify permission policies to use `CONDITIONAL` decisions with per-result filtering rather than blanket `DENY` for search document types - Restrict Elasticsearch/OpenSearch index access at the cluster level so that the search service account can only reach expected Backstage indices, limiting the blast radius if the authorization bypass is triggered.

sources

Which sources assert this record, and when.

nvd osv NVD CVE.org MITRE

published 2026-10-07modified 2026-10-16

references (3) nvd

External citations — patches, advisories, analysis.

https://github.com/backstage/backstage/commit/2d5d3e77d630455d6d48cfa8f31fd3c126fd6f29Patch
https://github.com/backstage/backstage/releases/tag/v1.54.1PatchRelease Notes
https://github.com/backstage/backstage/security/advisories/GHSA-9325-vq29-gp3vMitigationVendor Advisory

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