What is CVE-2026-106463?

CVE-2026-106463 is a medium-severity vulnerability in @Backstage Plugin-Catalog-Backend-Module-Gitlab, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-10-06.

How severe is CVE-2026-106463?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in @Backstage Plugin-Catalog-Backend-Module-Gitlab

CVE-2026-106463

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.

Vulnerability class: Broken Access Control

Published 2026-10-06 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

@Backstage Plugin-Catalog-Backend-Module-Gitlab — versions < 0.8.7
Backstage — versions < 1.54.6

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

Frequently asked questions

What is CVE-2026-106463?: CVE-2026-106463 is a medium-severity vulnerability in @Backstage Plugin-Catalog-Backend-Module-Gitlab, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-10-06.
How severe is CVE-2026-106463?: Medium severity. CVSS v3 base score is 5.4 out of 10.