Medium 5.4Published Oct 6, 2026

CVE-2026-106463Backstage: Improper authorization in GitLab organizational user ingestion

Updated under an hour ago (2026-10-19 08:23 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for backstage

Exploited in the last 30 days

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.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Undergoing Analysis
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

backstage backstage backstage:backstage (from the name)	before 1.54.6	CNA record
@backstage plugin-catalog-backend-module-gitlab backstage:plugin_catalog_backend_module_gitlab (from the name)	before 0.8.7	CNA record

References

https://github.com/backstage/backstage/security/advisories/GHSA-gp6m-x9vw-5c5xx-refsource-confirm
https://github.com/backstage/backstage/commit/c211b4b67d28efd2f4fac63e35e2ac515e305cb3x-refsource-misc
https://github.com/backstage/backstage/releases/tag/v1.54.6x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.