CVE-2026-106562CWE-754CWE-863broken-access-control

CVE-2026-106562

Medium · published October 7, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
8.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00197 · 8.9th percentile
Weaknesses
CWE-754 · Improper Check for Unusual or Exceptional Conditions; CWE-863 · Incorrect Authorization
Published
2026-10-07T19:17Z
Affected products (3)
ProductVersionsFixed in
linuxfoundation/backstage\/plugin-search-backend< 2.1.62.1.6
linuxfoundation/backstage\/plugin-search-backend-module-elasticsearch< 1.8.71.8.7
linuxfoundation/backstage< 1.54.11.54.1
References (3)
https://github.com/backstage/backstage/commit/2d5d3e77d630455d6d48cfa8f31fd3c126fd6f29 · [email protected]https://github.com/backstage/backstage/releases/tag/v1.54.1 · [email protected]https://github.com/backstage/backstage/security/advisories/GHSA-9325-vq29-gp3v · [email protected]
EPSS history
Timeline
  • 09 OCT 03:26Z
    EPSS moved — → 0%
    epss
  • 07 OCT 14:54Z
    Backstage: Incorrect authorization in search engine permission filtering
    cvelistv5