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Fencer Vulns
medium 4.3

CVE-2026-106562 json

Backstage: Incorrect authorization in search engine permission filtering

published 2026-10-07 33 d ago modified 2026-10-16 24 d ago also GHSA-9325-vq29-gp3v , EUVD-2026-94375

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm @backstage/plugin-search-backend 2.1.6
  • npm @backstage/plugin-search-backend-module-elasticsearch 1.8.7
  • linuxfoundation backstage/plugin-search-backend 2.1.6
  • linuxfoundation backstage/plugin-search-backend-module-elasticsearch 1.8.7
  • linuxfoundation backstage 1.54.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-106562 updated cvss 4.3

plugin-search-backend: plugin-search-backend-module-elasticsearch: Backstage: Information disclosure via search permission filter bypass

  • Red Hat Developer Hub 1 rhdh/rhdh-hub-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/automation-portal, ansible-automation-platform/bootc-automation-portal-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
33 d ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
npm @backstage/plugin-search-backend
<2.1.6
2.1.6
npm @backstage/plugin-search-backend-module-elasticsearch
<1.8.7
1.8.7

Affected products

  • backstage backstage
  • @backstage plugin-search-backend
  • @backstage plugin-search-backend-module-elasticsearch

Classification

Weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions
  • CWE-863 Incorrect Authorization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.