CVE-2026-106463

Backstage: Improper authorization in GitLab organizational user ingestion

Published Oct 6, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
Backstage is an open framework for building developer portals. Prior to 0.8.7, the @backstage/plugin-catalog-backend-module-gitlab package is affected by improper authorization in gitlab organizational user ingestion. Deployments that enable GitLab organization event ingestion and rely on scoped catalog users as an access boundary may admit an unintended catalog identity. Depending on sign-in and permission configuration, this may allow unauthorized access with the permissions of a standard authenticated user. This issue is fixed in version 0.8.7.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-gp6m-x9vw-5c5x Backstage has improper authorization in GitLab organizational user ingestion
History
Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/plugin-catalog-backend-module-gitlab
CPEs cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:backstage\/plugin-catalog-backend-module-gitlab:*:*:*:*:*:node.js:*:*
Vendors & Products Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/plugin-catalog-backend-module-gitlab
Type Values Removed Values Added
First Time appeared Backstage
Backstage backstage
Backstage plugin-catalog-backend-module-gitlab
Vendors & Products Backstage
Backstage backstage
Backstage plugin-catalog-backend-module-gitlab
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 0.8.7, the @backstage/plugin-catalog-backend-module-gitlab package is affected by improper authorization in gitlab organizational user ingestion. Deployments that enable GitLab organization event ingestion and rely on scoped catalog users as an access boundary may admit an unintended catalog identity. Depending on sign-in and permission configuration, this may allow unauthorized access with the permissions of a standard authenticated user. This issue is fixed in version 0.8.7.
Title Backstage: Improper authorization in GitLab organizational user ingestion
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 7, 2026, 5:07 PM
Reserved
Oct 6, 2026, 4:49 PM
Status
Analyzed
Published
Oct 6, 2026, 9:17 PM
Modified
Oct 22, 2026, 6:52 PM
Severity
Moderate
Public date
Oct 6, 2026, 8:32 PM